Going vegan doesn't mean missing out on incredible food like this.

Why Go Vegan? The Top Reasons Explained

By Erik Marcus

Why go vegan? The elevator pitch conveying the best reasons to go vegan crams several compelling points into just a few seconds. It goes something like this:

A vegan lifestyle prevents a tremendous amount of animal slaughter and suffering. It offers a potent way to shrink our environmental footprint, especially in regard to climate change. And a well-planned vegan diet can fuel the highest levels of fitness, while reducing our risk of various chronic diseases. Plus, the food is insanely delicious and it becomes more widely available every year.

The above sentences get us off to a nice start, but they don’t begin to do the subject justice. Indeed, getting up to speed on every important reason to go vegan would require months of reading. You’d have to explore topics like plant-based nutrition, animal rights philosophy, and the exploitation of slaughterhouse workers. You’d also need to delve into the damage the meat industry inflicts on human health and the environment. There are a dozen other related subjects to explore, but you get the idea.

That said, we have to start somewhere. Learning the essentials won’t take long. This essay will introduce you to the strongest reasons to go vegan, and you can finish it in under an hour.

As we’re about to see, ridding your diet of animal products delivers remarkable benefits. You may never encounter a topic more worthy of your attention.

Defining a Vegan Diet

Vegan diets exclude all foods produced by or derived from animals: meat, fish, dairy products, eggs, and honey. Conversely, you can define veganism as a diet based entirely on plants.

Many vegans go beyond eating to remove animal exploitation from their entire lifestyle. They’ll avoid clothing made of wool and won’t buy leather furniture. Nor will they buy cosmetics tested on animals or made from animal ingredients. While such steps deserve consideration, to keep this essay concise I will focus entirely on diet.

The Virtues of Plant-Based Diets

Even if this essay doesn’t persuade you to go vegan, you’ll doubtless discover several clear benefits of eating a “plant-based” diet. Why am I so sure? Because plant-based diets offer powerful advantages despite requiring only minimal commitment. You’ll never need to worry that you’ll slip, cheat, or screw up. You can follow a plant-based diet and still eat Thanksgiving turkey or a summer barbecue.

Pretty much every food politics writer worth taking seriously—including Michael Pollan, Mark Bittman, and Eric Schlosser—advocates diets based heavily on plants. All it takes to go plant-based is to make a point of eating vegan foods whenever possible. Perhaps the best reason to go plant-based involves the lack of a sensible counterargument. In all my years writing about food politics, I’ve never once seen anyone (other than a few paleo diet fanatics) seriously attempt to refute the advantages of eating mostly plants. Eating more fruits and vegetables can significantly reduce risk of chronic disease. And of course, plant-based diets also keep farm animals from slaughter, while simultaneously protecting the environment.

The commitment to eat mostly plant based usually initiates a virtuous cycle, where one positive change leads to another and then to another.

The Joy of Exploring Plant-Based Foods

When you regularly try new vegan foods, the ones you like best quickly work their way into your everyday diet. So as time goes by, your diet will likely move in a vegan direction without any concerted effort on your part. Plenty of current vegans got there by gradually sliding down the plant-based slope.

A number of cute neologisms can inspire you to make meaningful changes without getting caught up in perfectionist thinking: reducetarian, flexitarian, chegan, plant-strong, and even veganish. If any of these terms resonates with you, just grab ahold of it and start thinking along those lines as you begin trying more vegetarian and vegan meals.

Several other related concepts may also prove helpful, including: Meatless Mondays, Mark Bittman’s Vegan Before 6:00 plan, or giving a vegan diet a try for a week or a month. All of these possibilities can inspire significant change without imposing requirements for lifelong perfection.

Why Go Beyond Plant-Based?

Now that we’ve touched on the benefits of eating mostly plant-based foods, let’s consider the advantages of going further and becoming vegan. What does a totally vegan diet give you that other diets can’t?

Going vegan pays off in numerous ways. Many of the same reasons to go plant-based apply even more forcefully to becoming vegan. The great virtue of vegan foods is that they slam the door shut on so many disagreeable things—especially animal suffering.

Confronting Animal Cruelty in Agribusiness

Meat eaters and vegans have something important in common: we each recoil when confronted with animal cruelty. Sadly, you can find extraordinary cruelties almost wherever you look within the meat, dairy and egg industries. And slaughterhouses—even the few that adhere to the very best standards—are invariably horrifying.

Countless vegans spent decades blissfully devouring meat and other animal products until, one day, they encountered a slaughterhouse video. Just a minute or two spent watching any of these videos can inspire an instantaneous dietary change.

Writing just can’t convey the horrors of industrialized animal slaughter—the more detailed and accurate the written description, the more overwrought and implausible it often sounds. So to truly understand what happens at slaughterhouses, you must actually witness the killing, rather than merely read about it.

YouTube hosts hundreds of videos showing the slaughter of every type of animal raised for food. Most people can only last a few seconds before turning away. But what happens to animals is right there for everyone to see, for anyone willing to look. If we’re going to eat meat, don’t we each share an ethical obligation to see for ourselves how it’s produced?

If you oppose violence, a vegan lifestyle deserves your careful consideration. Nothing that follows can adequately convey what animals experience in the slaughterhouse, but I can at least lay out the essentials.

Common Stunning Methods

Let’s begin with the most common method of cattle slaughter. Here, a cow steps onto the kill floor, and a worker puts a captive bolt pistol to the animal’s forehead. The trigger pulled, a steel rod shoots through the skull, instantly inflicting a massive brain injury. A chain then hoists the cow into the air, and another worker cuts her throat. Over the following minutes she bleeds out as her still-pumping heart gushes blood onto the floor.

While horrifying to witness, captive bolt stunning is almost is almost certainly the least cruel method of stunning utilized by slaughterhouses.

Some pig slaughterhouses also use captive bolt pistols, but many instead knock animals unconscious with carbon dioxide, a gratuitously inhumane practice. In videos taken at these facilities, you can see panicked pigs desperately trying to push their snouts out of the carbon dioxide chamber to breathe fresh air. Still other pig slaughterhouses knock the animals unconscious with a jolt of electricity, which raises the question of whether the stunning adds to rather than diminishes total suffering.

The cruelest slaughter is reserved for chickens. Many countries, including the United States, have no laws to protect poultry during slaughter. Large poultry slaughterhouses kill nearly three birds per second, which means the slaughter occurs far too quickly for workers to cut throats by hand. Instead, a mechanical blade slits the chickens’ throats. If, as sometimes happens, the blade misses the neck, the bird will be fully conscious a couple minutes later when he’s dropped into a tank of scalding water used to remove feathers from dead birds.

Kosher and halal slaughterhouses don’t stun animals prior to slaughter, since scripture requires the animals bleed to death while fully conscious. This leads to all sorts of deeply disturbing slaughterhouse practices, as one hidden camera investigation after another has revealed.

No matter the slaughter method, one reality remains constant: all meat comes from animals who arrived at the slaughterhouse desperately wanting to live. When unloaded from the trucks, every cow or pig invariably looks frantically about, seeking a direction to scramble to safety. But their only path forward leads to the blade.

Slaughter of Layer Hens and Dairy Cows

Meat obviously necessitates slaughter, but so do milk and eggs. The only difference is that meat comes from animals who have been killed, whereas milk and eggs come from animals who will be killed, guaranteed.

Why slaughter perfectly healthy dairy cows and layer hens? Because, as these animals age, their output of milk and eggs sharply diminishes. By roughly one-third of their natural lifespan, yields decline sufficiently to render the animals unprofitable. So they are killed and replaced with younger, more productive animals.

Slaughter methods for “spent” hens and “dried up” dairy cows can be especially troubling since the flesh is of low value or outright unsalable. Egg farms in particular “depopulate” their hen-houses in particularly grisly ways, sometimes even asphyxiating the birds by spraying them the sort of oxygen-absorbing foam commonly used in fire extinguishers.

Farm Animal Suffering in Agribusiness

As unsettling as slaughter may be to contemplate, it’s only the starting point for becoming acquainted with the ethical issues surrounding animal agriculture. It’s probable that most of the suffering and cruelty tied to the meat, dairy, and egg industries relates to how the animals are raised rather than how they are killed.

I know that thinking about animal suffering is extraordinarily unpleasant. It’s only natural to want to tune out the gory details. If you find yourself especially troubled by having to listen to this awful stuff, perhaps that right there is the best reason of all to move towards a vegan diet.

As we’re about to see, if you wanted to design a system that torments countless billions of animals in a multitude of disturbing ways, the methods employed by modern-day factory farming would be impossible to beat. Each year, about 50 billion farm animals are subjected to factory farm conditions. (Note 1)

The Cruelty of Factory Farming

Animal advocates use the term, “factory farming” to refer to the dominant methods of animal farming used in industrialized countries. While there are important differences between how cattle, pigs, and poultry are kept, most of these animals are raised at factory farms.

Prior to World War II, most farm animals lived under comparatively good conditions on small, family-owned farms. These animals typically received plenty of space, and they often had access to sunlight and fresh air. So, by any standard they had decent surroundings even if their lives were destined to be violently cut short. Farmers of that era didn’t provide satisfactory living conditions out of the goodness of their hearts, they did it because mortality rates surged to unprofitable levels when their animals’ basic living needs weren’t met.(Note 2 )

The Great Depression and the Dust Bowl era saw massive changes in America’s system of agriculture. Land grant colleges across the United States pioneered an entirely new form of farming both crops and animals. Starting in the 1920s, agriculture colleges began teaching farming with the same rigor applied to any other academic discipline. And as a new generation of farmers were taught subjects like chemistry and biology, everything about plant and animal farming changed.

The petrochemical-based “Green Revolution” that occurred between the 1930s and 1960s boosted crop yields, arguably raising standards of living worldwide while averting numerous famines. But within animal agriculture, the introduction of factory farming methods increased animal suffering to unconscionable extremes.

Meat, Milk, and Eggs Get Cheaper than Ever

Adjusted for inflation, the price of animal products dropped significantly thanks to the efficiencies gained through factory farming. This gave rise to people eating more meat, milk, and eggs than ever before—while animal welfare standards simultaneously collapsed.

The cratering of welfare standards directly arose from the industry’s fierce competition to slash costs to the minimum. Thousands of meat, dairy, and egg producers quit business every year.

The dairy industry offers a good example of the relentless financial pressure that animal farmers face. Beginning in 2013, dairies throughout the Northeast U.S. lost money four years in a row. In each of those years, wholesale milk prices came in well below production costs. Over that period, one regional dairy cooperative sent out suicide prevention letters after two of its members killed themselves. (Note 3)

To stay afloat financially, meat, dairy, and egg producers must cut expenses wherever possible. Tragically, many of these cost-cutting measures are tremendously cruel.

Crowding at Factory Farms

No farming cruelty exceeds those carried out by the egg industry. In countries and states that haven’t yet outlawed the practice, egg farmers keep their hens in “battery cages,” where each hen has less floor space than a sheet of printer paper. Additionally, these hens spend their entire lives standing on wire-bottomed cages. Predictably, the wire causes abrasions that lead to open sores and bruises. The birds sleep while being pressed against the cage and literally never have a moment of comfort.

Pigs face comparably appalling living conditions, especially females used for breeding. These sows often spend their entire lives in gestation and farrowing crates. Standard crates forbid any sort of normal movement. In fact, they are so narrow that the sow lacks sufficient space to turn around.

Cattle Confinement

What about cows and cattle? Whether in person or in movies, we’ve all seen cows grazing scenic hillsides. Beef cattle are the only farm animals that nearly always live a portion of their lives outdoors in good conditions. Some dairy cows also spend much of their lives outdoors. But many dairies are factory farms that intensively confine their cows for their entire lives.

Even for the lucky cattle who spend time outside, this experience is only temporary. Beef cattle are invariably “finished” at feedlots. There, they live out their final months crowded onto filthy, barren plots of land.

One such feedlot is the notorious Harris Ranch that’s adjacent to the Interstate 5 corridor of California. Having driven this stretch of Interstate countless times, I have often smelled the stench of the feedlot from several kilometres away. The feedlot covers a vast expanse of land, with seemingly every square meter crammed with animals amassed on black manure-coated earth. If you’ve seen one feedlot you’ve seen them all. Any large feedlot is basically indistinguishable from what you can see at Harris Ranch.

Conditions are just as bad at many dairy farms. The industry calls the most crowded of these places “dry lot” facilities. Some dairies are nearly indistinguishable from beef feedlots. The easiest way for an untrained observer to spot the difference is to look at the animals: most dairy cows have spotted coats whereas beef cattle are usually solid dark brown.

As with beef cattle at feedlots, “dry lot” dairy cows have no opportunity to graze and are instead fed silage out of troughs. Twice a day, they’re herded indoors and hooked up to milking machines.

Mutilations at Factory Farms

Just as bullying and violence pervades poorly run schools and prisons, the same is true at factory farms. The staggering levels of crowding incite the animals to take their frustrations out on each another. More crowding inevitably means more violence. The problem goes away if you remove stresses and provide adequate living space, but that solution costs too much for most facilities to contemplate. Factory farms instead inflict a variety of mutilations onto the animals in order to keep them from injuring one another.

Pigs raised in overcrowded conditions are apt to bite one another’s tails. At factory farms, workers cut the tails cut off and clip their “needle teeth.”

Hens crowded into battery cages can peck each other to death. So egg producers use a hot blade to sear off the pointy final third of their beaks—rendering it unlikely that a peck can draw blood. While a beak may appear woody on the outside, the hen’s mouth lies inside and is full of nerve endings. So beak searing entails a partial (and no doubt excruciatingly painful) amputation of the bird’s mouth. Some hens die after beak searing renders them unable to drink or eat.

Unlike pigs and chickens, cows don’t commonly attack one another when subjected to stress. But in overcrowded conditions, horns endanger both workers and other cattle, so they’re painfully amputated or sawed off. Ranchers also brand their cattle with a hot iron in order to deter theft. Dairy farmers usually cut off their cows’ tails so they don’t interfere with the milking machines. That leaves the cows with no way to shoo away flies, which are often legion at dairies and a constant source of misery.

In order to improve meat tenderness and also eliminate the “boar taint” stench in pork, farmers castrate nearly every male calf and piglet. I’ll spare you the details of how this is done, but interested readers can follow read this article or watch this video.

Each of these mutilations, including castration, typically occurs without anesthesia. A local anesthetic would greatly reduce pain, but factory farm owners regard even the cheapest pain killers as prohibitively expensive.

Selective Breeding

Even when raised in good environments, farm animals commonly suffer painful health problems. That’s because decades of selective breeding have boosted egg yields, milk yields, and growth rates to staggering extremes. These breeding advances make animal agribusiness more efficient and productive than ever, but the animals pay a terrible price.

When it comes to genetics, no animal is more revved up than chickens, and none suffers more as a result. Chickens raised for meat grow more than four times faster than birds raised in the 1950s. (Note 4) This rapid growth puts a severe strain on the birds’ cardiovascular system, and up to 4 percent of birds die from “sudden death syndrome.” In their brief lives, many of these chickens also suffer from debilitating leg problems brought on by their rapid growth rates. One large study found that more than 25 percent of chickens have trouble moving, with nearly 4 percent, “almost unable to walk.” At farms that raise chickens for meat, it is common to find birds with broken legs. Unable to walk to food or water, they die of thirst or starve to death. No one notices their plight or pauses to provide care—time is money, and a chicken who is going to die anyway isn’t worth the attention.

Just like every human pregnancy carries risk, complications can arise every time a hen lays an egg. So the more intensive the breeding to increase egg productivity, the greater the chances that something will go wrong. Modern hens frequently suffer a “prolapse” while laying their eggs. Here, the egg becomes stuck to the hen’s internal organs. During laying, reproductive and digestive organs can come out along with the egg. Without prompt veterinary attention, infection will set in and the bird will die. Since the requisite veterinary care costs at least twenty times more than a replacement hen, none of these afflicted birds get the treatment they need to survive. In typical sheds that house tens of thousands of hens, it is unlikely they will be noticed at all.

Nearly all hens afflicted with a severe prolapse will suffer a lingering death from blood loss or infection. In many cases, they take their dying breaths trampled by cage-mates while lying pressed against a wire battery cage floor. In the United States alone, millions of hens each year die in this manner as a result of prolapses and other conditions.(Note 5)

Dairy cows likewise suffer a variety of maladies brought on by selective breeding. Today’s cows may look the same as yesterday’s, but they produce over four times more milk per animal than did cows from 1950. (Note 6) A variety of health problems are attributable to these extreme milk yields, the most common of which is an inflammation of the udders, which is generally accompanied by infection. In cows with infected udders, the number of somatic cells in the milk increases dramatically. Laypeople have a more plainspoken word for “somatic cells.” That word is “pus.”

Thanks to their massive milk yields, udder inflammation and sub-clinical infection are widespread among modern dairy cows. So if you want to ensure your milk contains no pus, you must choose a plant-based variety like soy milk.

Undercover Farming Videos

I’ve written two books devoted largely to examining farm animal welfare standards. These experiences have convinced me that no words can do justice to the topic. In order to truly grasp what the animals experience, you really must visit factory farms yourself. Of course, factory farm owners don’t want the public to witness what’s going on. Most of these places therefore forbid visitors. Thankfully, the world contains people like my friend Cody Carlson.

Cody switched to a vegan diet at age nineteen. A few years later, he took a job at a large dairy farm in Upstate New York. He worked there for a month, then left to work in a pig-breeding facility in Pennsylvania. After that gig ended, he got jobs at two different egg farms. Cody’s choice of diet was not the only thing that set him apart from his coworkers. The other difference was that, each day when Cody arrived at the job, he wore a hidden camera.

What happens when you take people who lack decent employment opportunities, pay them a pittance, and put them in stressful work environments with minimal supervision? All too often, they take out their frustrations on the animals. The atrocities that undercover investigators like Cody have uncovered at factory farms are endless. I’ve seen videos showing turkeys being sexually violated. I’ve seen mother cows punched in the face. I’ve seen sheep kicked, thrown against walls, and laughed at while bleeding to death. I’ve even seen a worker strike a defenseless calf between the eyes with a pickaxe—on the orders of his boss. And all of this barely touches on the things that I’ve seen. I could go on and on with more examples.

Few jobs are as traumatizing as that of an undercover animal cruelty investigator. Yet many activists have stepped up to do this work. They’ve collectively shot hidden-camera videos at every sort of farm animal operation imaginable, from chicken hatcheries to cattle feedlots to pig farms. Still other undercover investigators have taken jobs at the slaughterhouses and fishing boats. No matter where these investigators show up, staggering cruelties reveal themselves.

YouTube hosts a vast assortment of undercover videos that expose the poultry and livestock industries’ widespread cruelties. In one video after another, you’ll see shocking degrees of confinement, appalling conditions, and sadistic behavior by workers.

Typically, whenever a new undercover video goes public, the guilty company makes a big deal of firing the workers caught abusing animals. While these firings are invariably well-deserved, they conveniently shift blame away from ownership and management. Yet the root of the problem is not with any individual worker. It’s invariably ownership and management that allows or even encourages these cruelties. Factory farms are owned and operated by people willing to inflict unfathomable amounts of suffering onto animals in order to cut costs.

All the Edges Rough

Many of factory farming’s worst abuses arise from overcrowding. Every farmer has a tremendous financial incentive to cram as many animals into the smallest space possible. On top of this intensive confinement, the industry strives to cut expenses to the absolute minimum.

These efforts play out in all sorts of distressing ways. No matter where in the system an animal may be, agonies and discomforts unrelentingly suffuse every moment. There is not one softer corner, nothing without an edge, no flicker of respite. Anything decent or worthwhile was squeezed out decades ago in the pursuit of profit.

Countless sources of misery exist within factory farming. Wherever you choose to look, a fresh hell opens up. For the sake of brevity, here are just three topics of dozens worthy of a lengthy book chapter:

  1. Specialized facilities called hatcheries churn out the billions of chicks a year for the poultry industry. At hatcheries servicing egg companies, one unwanted male chick hatches for every female chick. These males are useless to the industry, as they aren’t of the breed that can grow profitably for meat. At some of these hatcheries the male chicks are tossed into garbage cans and left to smother. At others, the chicks are promptly ground up alive. In the United States alone, hatcheries kill about 200 million newly-hatched male chicks every year.
  2. Buildings that house cows, pigs, or poultry rarely have fire sprinklers, and often go up in flames. When a fire strikes a poultry farm, hundreds of thousands can die. Since the year 2000, fires have killed more than 4.5 million chickens or turkeys, 220,000 pigs, and nearly 12,000 cows and calves.
  3. On the truck to slaughter, hard braking or sharp turns can throw animals from their feet. Once knocked down they’re often trampled by other animals. They’ll commonly reach the slaughterhouse too badly injured to stand back up. Pigs and cattle who arrive at the slaughterhouse unable to walk often perish from shock or thirst. There’s no financial incentive to give them attention, since animals unable to stand cannot legally be sold for human food. In the United States alone, hundreds of thousands of “downer” cattle and pigs arrive at slaughterhouses each year. Sometimes they linger untended for days before dying.

There’s no room here to address dozens of other comparably important topics. No room to talk about what the animals can see coming as they look down the slaughter line. Nor can we linger here on the experiences of the dairy cows who watch their newborns taken away just a day or two after birth. No space either to talk about the millions of birds and cattle who have been buried alive in open pits during disease outbreaks. We don’t have time here to consider the runt piglets who fail to grow profitably, whose heads are slammed into concrete. Factory farming is a bottomless horror, no matter where you choose to look.

Animal agribusiness doesn’t care about animals, it doesn’t care about its workers, and it doesn’t care about you.

Why Not Just Avoid Factory Farmed Foods?

Unless specifically labeled to the contrary, you can assume that every animal product came from a factory farm. As we’ve seen, every sort of cruelty occurs at these places.

A number of omnivores have pushed back against factory farming by demanding higher animal welfare standards. Most natural foods stores and supermarkets sell specially-labeled animal products from farms that promise better animal welfare. Additionally, many small-scale meat and egg producers rent stalls at local farmers’ markets.

At their best, alternative farms deliver genuine animal welfare improvements. That’s mainly because they refuse to partake in the cruelest farming practices, particularly with regard to confinement and crowding. And with this reduced crowding, mutilations like beak searing and tail-clipping can be eliminated. That’s because animals unstressed by crowding don’t tend to attack or bully one another.

Unfortunately, the substantial price premium these higher welfare foods command exerts an overpowering temptation on producers to cheat. All too often, farmers exaggerate or outright lie about standards for animal care. Just like at factory farms, every alternative producer faces the strongest financial temptation to push limits. Since the costs of delivering genuinely good animal welfare are so high, there are always farmers willing to cut corners.

In fact, some so-called “organic” farms are factory farms in every sense of the word. Sure, they use higher quality animal feed and refrain from using antibiotics, but animal welfare remains deplorable. At one point, several of America’s largest “organic” dairies exploited a regulatory loophole that allowed them to keep their cows confined indoors 310 days out of every year.

Animal Welfare Certification Programs

Many consumers are aghast to discover poor animal welfare at organic farms. So top food service companies and groceries have implemented a variety of certification programs. Much like hotels are typically rated from one to five stars, one leading program offers five different tiers of animal welfare. That way, at least in theory, the consumer can decide for herself which practices are acceptable, and choose products accordingly.

Of course, every welfare certification system depends on farmers having the integrity to live up to their promised standards. For these programs to succeed in their mission, it’s imperative that they quickly catch any farmers who cheat. This in turn demands careful monitoring and strict enforcement by the certification agency. It’s fair to say that, in the real world, such monitoring is expensive, occasional, and unreliable.

Checking Up on Your Local Farms

Alternately, you can do your own monitoring. This requires meeting the sellers of animal products at your local farmers’ market, and then visiting their farms personally to evaluate the conditions. Me, I have better things to do with my time. I don’t want to spend my precious afternoons driving out to distant farms to verify standards of animal care. Much easier, I think, to simply avoid foods where egregious abuses of consumer trust and animal welfare are commonplace.

In this respect, laziness surely ranks as one of the most underappreciated reasons to consider a vegan diet. You undoubtedly have more pleasant ways to spend your time than investigating animal welfare compliance. And why expend all that effort when there exists such an abundance of delicious vegan food?

And anyway, no matter how you strive to purchase only the highest-quality animal products, numerous problems remain either unaddressed or impossible to remedy. As just one example, there is simply no way to eliminate slaughter. Even the highest-welfare producers kill their dairy cows and layer hens well before midlife, as yields decline. What’s more, many farms are legally prohibited from slaughtering their animals on-site. So, much of the time, “free-range” and “pasture-raised” animals end up at the very same slaughterhouses that kill factory farmed animals.

Diving a little deeper, the use of heirloom breeds is all but unheard of in commercial agriculture. So even at the very best “pasture raised” farms, the animals suffer the same productivity-related health problems as their factory-farmed counterparts.

In short: the more you care about sourcing animal products from only the most conscientious producers, the messier and more unsatisfying your task becomes.

Counter-intuitively, it’s not vegans but omnivores who face the greatest inconvenience when it comes to conscientious eating. That’s because they face a barrage of tasks and expenses to ensure acceptable welfare standards. By contrast, aspiring vegans have it much easier—their primary task is to try delicious new foods.

Animal Welfare & Animal Rights

Now that we’ve seen how brazenly the food industry exploits farm animals, let’s consider how to address this problem. The two fundamental concepts of the animal protection movement—animal welfare and animal rights—offer powerful approaches.

Animal Welfare

Most animal protection efforts begin with animal welfare, a simple concept arising out of common decency. Animal welfare’s core message is: if you’re going to use animals for food, cosmetics, or anything else, you are obligated to eliminate needless suffering. Unfortunately, eradicating suffering is easier said than done. A great deal of the suffering intrinsic to animal use is expensive and difficult to remove. Verifying acceptable welfare is unreliable, since—as we’ve seen—farmers have every incentive to cheat.

Once someone begins to pay attention to animal welfare, some degree of dietary change is virtually inevitable. Nearly everyone who thinks carefully about animal welfare ends up eating fewer animal-derived foods, since that’s the easiest and most reliable way to cut out cruelty. In order to eliminate additional suffering, people also switch to free-range and pasture-raised animal products.

Many omnivores who give animal welfare a close look ultimately decide they can’t make peace with slaughter. Objecting to slaughter doesn’t just close the door on consuming meat, but eggs and dairy products as well.

Animal Rights

But animal welfare is only one approach to thinking seriously about the ethics of eating. The most important ideas offered by the animal protection movement relate not to animal welfare, but to animal rights. Animal welfare condones virtually any use of animals, as long as we attempt to minimize suffering. Animal rights rejects this world view and emphatically proclaims that animals are not ours to use however we wish.

As its name suggests, animal rights goes beyond animal welfare to proclaim that animals have rights. Just as it’s wrong to falsely imprison somebody, even if that prison is the Waldorf Astoria, it’s similarly wrong to raise animals for slaughter no matter how well they are kept.

The animal rights literature contains a number of lengthy and challenging books. Now, however, we’re going to pick out three easy concepts: speciesism, subject of a life, and utilitarian thinking. Together, they answer the “why go vegan?” question with some exceptionally clear thinking.


Speciesism is probably the most widely-used concept related to animal rights. This word references attempts to justify exploitation on the basis of an animal’s species. Such justifications inevitably ignore facts of far greater relevance. The question of whether rights are unjustly violated should start by evaluating each individual animal’s ability (or lack thereof) to think, feel, and suffer.

When animals are mistreated, speciesism is often to blame. Perhaps the most obvious example relates to the fact that, by all accounts, pigs are more intelligent than dogs. Yet the pork industry’s standard farming practices would generate a stream of felony cruelty convictions if the industry raised dogs in the same manner.

Speciesism arises from the same sort of thinking that leads to other sorts of rights violations. How does racism, sexism, classism, and so forth relate to speciesism? All of these “isms” violate an individual’s liberties on grounds that are fundamentally arbitrary. The only thing that sets speciesism apart from the others is that it offers an excuse to exploit certain types of animals rather than certain groups of people.

Animals as the “Subject of a Life”

Every human and every animal experiences an individualized “subject of a life.” We all have a unique biography and set of experiences. No matter what sort of body we’re born into, we’ve got one incarnation filled with moments related to companionship, family, and interactions with others. While the experiences of humans and other animals differs, it’s not within our rights to cut these lives short.

Let’s now reflect on why, across every culture, the punishment for murder is invariably severe. The answer is undoubtedly because prematurely ending someone’s life is a bell cannot be unrung. The victim is forever denied the experiences she would have otherwise had, and no remedy for this injustice exists. Certainly, if we agree that murder demands severe punishment, we become obliged to examine the ethics of animal slaughter. To cut short an animal’s life is the ultimate violation of that being’s only opportunity to exist. And to do this for culinary pleasure, when abundant delicious alternatives exist, seems especially problematic.

Maybe there’s something to the idea of looking at a pig or chicken and deciding, “It may not be much of a life, but it’s all they’ve got—and it isn’t ours to take.”

Animal Rights and Utilitarian Thinking

One final approach to thinking about animal rights is worthy of careful consideration: the utilitarian philosophy of Jeremy Bentham, which Peter Singer incorporated into his 1975 classic, Animal Liberation.

Utilitarianism seeks to evaluate every situation in order to maximize joy for all parties. For instance, it is far better for ten people to each receive one sandwich, than for one person to get all ten sandwiches. Sure, that one person at the top might feel increased gratification by receiving ten sandwiches instead of one. But there’s no denying that maximizing total joy demands everybody gets a sandwich. Utilitarianism is based on the idea that morality is expressed by maximizing total joy and minimizing total suffering.

Much like we’ve just seen with our sandwich example, our use of animals carries a strong utilitarian component. Most of us can agree, for instance, that the pepperoni on pizza tastes good. There is consequently some added joy that comes with being able to order your pizza with pepperoni. But from a utilitarian point of view, it’s unethical to value this added joy without weighing it against how the pig suffered to produce this pepperoni.

In such cases, the animal suffering associated with a given food doubtless far outstrips the joy derived from its consumption. We live in a time when vegan meats, dairy products, and eggs become better and more widely available every year. Day by day, the argument that non-vegan foods provide unique and irreplaceable pleasures is increasingly difficult to entertain.

Utilitarian thinking applies not just to food, but to every animal product from cosmetics to fur to leather. Nobody would pretend it’s possible to calculate joy vs. suffering with the precision of crunching numbers on a spreadsheet. But even so, utilitarianism probably offers the most helpful framework available for evaluating the ethics of animal use.

Choosing a Diet that Aligns with Your Values

The concepts of speciesism, subject of a life, and utilitarianism offer ample reason to go plant-based—or to move beyond that to a vegan lifestyle.

Here then, we arrive at what I consider the crux of the matter: are you okay taking a healthy animal who clearly wants to live, and cutting her throat?

Is slaughtering animals for food a violation of their rights, or is this part of the circle of life? Whatever your answer, this question certainly deserves the most careful reflection from each of us. If vegans have any basis to object to the food choices made by most of society, it’s that the question of whether animals’ rights are systematically violated rarely receives serious consideration.

Why Go Vegan for Your Health?

While no diet can guarantee a long and healthy life, becoming vegan may improve your odds. That’s largely because a vegan diet eliminates a number of unhealthful foods, including red and cured meats—two foods strongly linked to colon cancer.

Vegans also tend to eat far more vegetables and fruits than non-vegetarians. Studies consistently show that people who eat the most fruits and vegetables tend to enjoy better health. Research also suggests that vegans suffer lower rates of heart disease and diabetes. This reduced risk is partly due to the fact that vegans are statistically leaner and much less prone to obesity than the general population, but this isn’t the whole explanation. Additional benefits probably arise from low saturated fat intake and from the healthful compounds in plant foods.

The Potential Benefits of Ditching Dairy

A surprisingly large number of vegans will tell you that quitting dairy changed their lives. Milk products may cause all sorts of chronic health ailments, from nasal congestion to acne to migraines to digestive problems. Many people suffer from these conditions for decades, yet never suspect that dairy products are to blame. I can personally attest to the health benefits that can accompany going dairy-free. My lifelong severe nasal congestion vanished forever within weeks of eliminating milk products from my diet.

With all this in mind, even people unswayed by environmental and animal rights concerns might consider going dairy-free. Given the potential rewards, it’s well worth trying out dairy-free diet for a couple of weeks.

Vegan Diets Support High Levels of Fitness

Some people fret that a vegan diet might impede serious athletic training, but that’s not a valid concern. A well-planned vegan diet can in fact support the highest levels of fitness. Both Rich Roll and Scott Jurek, two of the world’s most acclaimed ultra-endurance athletes, are long-time vegans.

But what about sports that require strength and bulk? Here too, examples of elite vegan athletes abound. And in 2018, fifteen members of the Tennessee Titans switched to a vegan diet.

Antibiotics in Factory Farming

In addition to the personal health benefits associated with a vegan diet, substantial public health benefits exist as well. That’s because large industrialized meat and dairy farms burden society with all sorts of hidden costs. One of the greatest of these relates to the incubation of new strains of antibiotic-resistant bacteria.

Through its lobbying efforts carried out alongside the pharmaceutical industry, the meat industry has for decades gotten away with using staggering amounts of antibiotics. A small portion of these important antibiotics are administered to farm animals in order to treat severe infections. But most of these antibiotics go to healthy animals in order to improve feed-to-meat conversion rates, and to prevent diseases associated with overcrowding.

In the United States, farm animals are responsible for something like 70 percent of all antibiotic use. Despite the well-known risks of antibiotic overuse, this percentage has been steadily increasing for years. Worldwide, the meat and dairy industries combine to use more than 100,000 tons of antibiotics per year.  Many of these antibiotics, like penicillin and tetracyclines, have irreplaceable uses in human medicine.

Confining thousands of animals in one space and dosing them all with antibiotics inevitably increases microbial resistance. This in turn renders important classes of antibiotics ineffective for urgent human medical needs. It’s difficult to definitively link the emergence of a lethal antibiotic-resistant strain of microbes to a particular animal farm. But there’s no legitimate doubt that animal agriculture is a main culprit behind the emergence of deadly antibiotic-resistant strains of bacteria like the MRSA superbug.

Tragically, lobbyists from the meat and pharmaceutical industries have long stymied efforts to restrict agriculture’s use of antibiotics. By rejecting meats sold by farms that use antibiotics, we can each send a message and avoid contributing to the problem.

How Do Vegan Diets Protect the Environment?

Raising animals for meat, milk, and dairy production wastes resources. It also damages the environment on a massive scale. When fed to farm animals, a substantial portion of the calories and nutrients present in grains is turned to manure. This manure invariably pollutes local water supplies and chokes rivers and other bodies of water. Worse yet, the meat and dairy industries are now recognized as a leading contributor to climate change.

Let’s now look more closely at all these considerations.

Eating with the Planet in Mind

Written by Frances Moore Lappé all the way back in 1971, Diet for a Small Planet was the most influential food politics book of its generation. Through her writing, Lappé awakened the public to the merits of eating lower on the food chain. That means basing your diet directly on plants, rather than on animals who in turn eat plants. Diet for a Small Planet was the first bestseller to explore how plant-based diets can shrink your environmental footprint.

Lappé helped establish food politics as a serious discipline by revealing the extraordinarily inefficiencies connected to animal farming. She documented how feeding grain to poultry and livestock wastes tremendous amounts of food energy, protein, and other nutrients. On a planet racked by crop failures and famine, squandering food resources on such a massive scale seems depraved. Moreover, the animal manure that factory farms generate is a serious menace in it own right.

Animal Manure and Dead Zones

Cows, pigs, and chickens produce mountains of manure, which causes massive environmental problems. Although animal waste makes outstanding fertilizer, its high water content makes manure too expensive to truck to distant farmlands to fertilize crops.

So instead of putting it to productive use as fertilizer, factory farms often get rid of their manure by spraying it onto surrounding land. Predictably, this method of disposal tends to foul local water supplies, especially well-water.

During heavy rains, flooding washes these pollutants into rivers. In the United States, much of this farm runoff ends up in the Gulf of Mexico, with dire consequences. The massive influx of nitrates and phosphates causes algal blooms that create a vast oxygen-free “dead zone” in the Gulf. The size and location of this dead zone varies according to the season and the weather, but averages more than 15,000 square kilometers. Whenever these dead zones move into new territory, virtually all fish and other marine life suffocate. The Chesapeake Bay, which is surrounded by a large portion of America’s poultry farms, experiences problems comparable to what occurs in the Gulf of Mexico.

Animal Agriculture’s Contribution to Climate Change

Of all the environmental reasons to embrace a plant-based diet, the strongest was unknown until recently. Scientists now recognize that the livestock industry is a main driver of climate change.

The world’s cows, pigs, and chickens probably surpass automobiles as a cause of climate change. The 74 billion farm animals raised worldwide each year collectively spew massive amounts of methane into the atmosphere. Methane is a potent greenhouse gas that traps at least thirty times more atmospheric heat than an equal amount of carbon dioxide.

Estimates vary regarding the percentage of climate change attributable to animal agriculture, but a comprehensive United Nations study pegged the industry’s contribution to the problem at about 14.5 percent.

Now, it’s true that greater efficiencies in livestock production have, over time, decreased emissions per animal. But regardless, animal agriculture is still a top emitter of greenhouse gases—and is undoubtedly the most sensible source to prioritize. Society can’t do away with gasoline and diesel powered vehicles overnight, nor can we abruptly convert to predominantly clean energy sources for electricity. But switching to a plant-based diet is easy, and in most cases actually saves money. Plant-based diets therefore deserve recognition as the most realistic opportunity to rapidly cut greenhouse gas emissions.

Air Pollution Associated with Animal Agribusiness

Factory farms produce truly staggering amounts of pollution, with grave public health consequences.

This hazard is most evident at indoor pig operations. The ammonia vapor generated by pig urine so degrades air quality that many pigs develop lung lesions. On top of that, workers have significantly elevated rates of respiratory problems.

And the health damage caused by this and other forms of agribusiness-generated air pollution extends far beyond pigs and workers. People living on properties that neighbor the sorts of pig farms described above commonly have impaired lung function. A 2021 study published in the Proceedings of the National Academy of Sciences found that upwards of 13,000 Americans die each year from air pollution generated by meat, dairy, and egg producers.

A Word About Seafood

Much of the writing addressing the “why go vegan?” question either insufficiently covers the problems related to seafood or ignores the topic outright. For most people moving gradually towards a vegetarian diet, seafood is the very last food they’ll stop eating.

But there are strong reasons to rid your diet of seafood. This is especially true for crabs and lobsters, since these animals are generally boiled alive. By all available evidence, this is an excruciating ordeal that’s indefensible to deliberately inflict onto another being.(“Note 7)

Can Fish Suffer?

What about fish caught by nets or fishing lines? Are they capable of suffering? And, if so, how severely can they suffer?

Studies definitively prove that fish are indeed capable of suffering. Whether they’re hooked or netted, death usually occurs either through suffocation. Deep water fish die a particularly agonizing death—as they’re pulled to the water’s surface, their organs frequently rupture from depressurization.

What’s more, the crowding and welfare standards at fish farms are every bit as deplorable as at any factory farm. Fish farms often use antibiotics in massive quantities. And the crowding at many fish farms commonly causes infestations of gruesome parasites called sea lice. These parasites attach themselves to the fish and eat away at the skin, causing open lesions.

Genetic modification causes widespread deformities and even deafness among farmed salmon. Perhaps most disturbing, these fish routinely escape into the open ocean where they can mate with wild fish. This interbreeding causes unpredictable and potentially ruinous consequences to the gene pool of native fish species.

The Environmental Cost of Fishing

Overwhelming evidence places the fishing industry among the world’s great environmental menaces. And the worldwide appetite for fish is insatiable. Since 1960, the amount of seafood taken daily from the world’s oceans, rivers, and lakes has more than tripled.

As a result, fish populations around the world are in steep decline. There simply isn’t enough fish to go around, and in some parts of the world, populations utterly depend on fish for survival. Perhaps, then, if people must eat seafood, it should only go to populations that would face hunger without it.

Enforcing regulations against overfishing poses almost impossible problems. Fishing boats commonly switch off their electronic tracking equipment to evade the enforcement of catch limits. In some parts of the world, fishing fleets have caused irreversible catastrophes. One prime example involves the waters off Newfoundland, which were once among the world’s most abundant cod fisheries. Over-fishing so ravaged the ecosystem that the cod have forever vanished.

Fishing fleets decimate marine species of every sort. The industry uses the term “by-catch” to describe the non-targeted marine life it kills. The world’s fishing boats are constantly pulling thousands of kilometres of nets through the sea. These nets ensnare every animal in their path, suffocating countless dolphins, sea turtles, sharks, and seabirds. Every kilogram of shrimp scooped up shrimping boats results in 4 to 6 kilograms of by-catch.

Moving from “Why Go Vegan?” to “How to Go Vegan?”

Given how many ways our food choices impact animals, our health, and our environment, this essay could offer only the briefest coverage of only the most important issues. But at least you now know enough to begin thinking productively about the topic.

If there’s one point that I hope this essay convincingly made, it’s that our food choices matter immensely. The way we eat carries enormous consequences. Your appreciation for the magnitude of this issue will only grow as you continue exploring the topic, and I hope I’ve inspired you to dive deeper into learning about food politics.

Small Changes Beat No Changes

Many people succumb to all-or-nothing thinking when it comes to contemplating dietary change. That is, if they decide they aren’t ready to go vegan, they’ll take no action at all. But even the smallest steps can deliver important results, while laying the groundwork for future progress.

So if you’re not ready to commit to major dietary change, even small shifts are worthwhile. Concepts like Meat Free Mondays, Reducetarian diets, and Vegan Before 6:00 offer something for everyone. If there’s an animal product you presently eat that you don’t really enjoy, why not cut it out today?

Above All, Enjoy Yourself!

Gravitating toward plant-based foods can be exciting and fun. It emphatically should not entail feelings of deprivation. To the contrary, the experience is all about discovery. Just by trying new foods frequently, your diet will automatically move in a positive direction.

Switching to a vegan diet requires zero willpower. That’s because it’s best not to focus on cutting out non-vegan foods. Instead, it’s wisest to crowd out those foods from your diet by discovering delicious new vegan foods. The more often you sample unfamiliar vegan foods, the more quickly you will gain ground.

I’ve followed a vegan diet for more than thirty years, so I hope you’ll take my word for this: as you incorporate more vegan foods into your diet, the amount of pleasure you derive from eating won’t decrease—it will instead grow by leaps and bounds. You’ll experience a wider variety of delicious food than ever before, and you’ll probably feel better as well.

On top of everything I’ve covered here, there’s one additional benefit of eating vegan meals you may have never considered. Nothing beats the feeling you’ll get from supporting a food business run by people with the most honorable intentions.

Always Take the Easy Route

So, when transitioning your diet, give yourself every advantage. You don’t have to figure everything out on your own. There are a number of fabulous resources to show you the way, and a little reading pays off big time. My essay on how to go vegan will teach you more useful information in thirty minutes than you’d learn from months of following a vegan diet. After reading it, check out my guide to easy vegan cooking.

Above all, enjoy yourself. Food is undeniably one of life’s great pleasures. And when you bring your diet into alignment with your core values and beliefs, you’ll gain a whole new level of satisfaction from eating.

For further reading, see my regularly-updated list of recommended books.

If you found this “Why Go Vegan?” essay of value, I need your help getting it into more hands. Would you please consider sharing it via email or social media? Please help me get this essay read by as many people as possible. Thanks! —Erik Marcus


  1. Compassion in World Farming, Strategic Plan 2018-2022, p. 6.
  2. Bernard Rollin was the first academic to rigorously explore the origins of factory farming. His 1995 book, Farm Animal Welfare: School, Bioethical, and Research Issues, expertly covers the development and spread of factory farming methods. A more recent recounting of the origin of factory farming can be found in Philip Lymbery’s Dead Zone: Where the Wild Things Were (2017).
  3. Associated Press, “Milk co-op mailing highlights suicide risk for dairy farmers. Saturday, March 03, 2018. Jim Kinney, “Information on suicide prevention arrives with checks for Agri-Mark’s dairy farmers; milk prices expected to keep dropping,” Feb. 7, 2018. MassLive.com
  4. M. J. Zuidhof et. al. “Growth, efficiency, and yield of commercial broilers from 1957, 1978, and 2005,” Poultry Science, Volume 93, Issue 12, 1 December 2014, Pages 2970–2982.
  5. Erik Marcus, Meat Market: Animals, Ethics, & Money, Brio Press, 2005. pages 20-21.
  6. The Changing Landscape of U.S. Milk Production,Milk: Production per Cow by Year, US
  7. The ethics of boiling lobsters to death is explored in minute detail in David Foster Wallace’s magnificent essay, “Consider the Lobster,” which I regard as among the greatest pieces of animal rights writing ever created.

Newsletter Signup

Our newsletter is sent out irregularly and infrequently, because we only want to hit your inbox when we’ve got something compelling to share.