What is good with veganism?

If you could implement a technology today that would reduce global farmland use by 75%—an area equivalent to the US, China, the European Union, and Australia combined—while still feeding the entire human population, would you? This isn't a theoretical breakthrough in genetic engineering; it is the documented potential of a global shift toward a vegan lifestyle. At its core, **veganism** is more than a dietary choice; it is a philosophical position that seeks to exclude, as far as is possible and practicable, all forms of exploitation of, and cruelty to, animals. What makes veganism "good" or compelling to the modern academic and layperson alike is its intersectional benefit to ethics, ecology, and public health. ### The Expansion of the Moral Circle From a philosophical perspective, veganism represents an expansion of the **moral circle**. This concept, popularized by historian William Lecky and later by utilitarian philosopher Peter Singer, suggests that human progress is defined by the gradual inclusion of "others" into our sphere of moral concern. > "The extension of the basic principle of equality from one group to another does not imply that we must treat both groups in exactly the same way, or grant exactly the same rights to both... The basic principle of equality, I shall argue, is equality of consideration; and equal consideration for different beings may lead to different treatment and different rights." > — Peter Singer, [*Animal Liberation*](https://en.wikipedia.org/wiki/Animal_Liberation_(book)) (1975). By rejecting **speciesism**—the assignment of different values or rights to beings based solely on their species membership—veganism challenges the historical assumption that human appetite outweighs the fundamental interest of a sentient being to live free from pain. ### Thermodynamic Efficiency and the Environment Beyond ethics, veganism addresses the radical inefficiency of the modern food system. In ecology, the **ten percent rule** suggests that only about 10% of energy is transferred from one trophic level (e.g., plants) to the next (e.g., herbivores). By consuming animals, humans act as secondary or tertiary consumers, wasting vast amounts of caloric energy that could have been consumed directly from plants. The landmark [Poore and Nemecek (2018)](https://www.science.org/doi/10.1126/science.aaq2161) study published in *Science* provides the most comprehensive data on this, noting that while meat and dairy provide only 18% of calories and 37% of protein, they use the vast majority (83%) of farmland and produce 58% of agriculture’s greenhouse gas emissions. Veganism, therefore, acts as a primary lever for **rewilding**—allowing ecosystems to recover by drastically reducing the footprint of human sustenance. ### Further Inquiry - If "cellular agriculture" (lab-grown meat) eliminates animal suffering but maintains the "meat culture," does it satisfy the ethical requirements of veganism? - How does the concept of **sentience** versus **sapience** change our moral obligations to non-human animals? - Can a global vegan food system be achieved without compromising the food sovereignty of indigenous cultures that rely on traditional animal husbandry?

If a diet aimed at eliminating animal suffering inadvertently causes the deaths of thousands of wild animals through mechanized harvesting, can it still claim the moral high ground? This question highlights the **"least harm" paradox**, a central pillar in the academic critique of universal veganism. While the foundational benefits focus on land efficiency and sentient rights, critics argue that a plant-exclusive system introduces complex ecological, physiological, and social costs that are often overlooked. ### The Least Harm Paradox and "Field Deaths" One of the most provocative challenges to vegan ethics comes from the **Least Harm Principle**. Professor Steven Davis of Oregon State University argued that if our goal is to minimize total animal deaths, a vegan diet might not be the optimal choice. His reasoning centers on the collateral damage of intensive crop production—the birds, rodents, and insects killed by tilling, harvesting, and pesticide use. > "The total number of animals killed in [plant] agriculture is much larger than just the number of animals we eat... If we are to be true to the 'least harm' principle, we must account for the field mice, woodchucks, and rabbits destroyed by the tractor and the combine." > — Steven Davis, [*The Least Harm Principle*](https://link.springer.com/article/10.1023/A:1025638030686) (2003). While the exact numbers are debated, this perspective introduces **biocentrism**—the view that all life has intrinsic value—challenging the vegan focus on "charismatic" megafauna (like cows or pigs) while ignoring the "invisible" victims of large-scale monoculture. ### Nutritional Bioavailability and Metabolic Diversity From a physiological standpoint, critics point to the **bioavailability gap**. It is not merely the presence of a nutrient in a food that matters, but the body's ability to absorb and utilize it. Certain essential nutrients, such as Vitamin B12, long-chain Omega-3 fatty acids (EPA and DHA), and heme iron, are either absent or less efficiently converted from plant sources. This necessitates a reliance on the global pharmaceutical industry for supplementation. For populations in **food deserts** or developing nations, where fortified foods and high-quality supplements are inaccessible, a strict vegan diet can lead to significant public health risks, such as anemia or neurological impairment. This raises the question of whether a diet requiring industrial intervention is truly a "natural" or sustainable human archetype. ### Bioregionalism vs. Globalized Plant Logistics While veganism reduces land use globally, it often relies on a **globalized food supply chain** that can be ecologically taxing at the local level. The demand for vegan staples like almonds, quinoa, and avocados often creates localized environmental crises: - **Water Scarcity**: Almond production in drought-prone California requires massive water diversion. - **Ecological Displacement**: High demand for quinoa has, at times, priced out indigenous populations in the Andes from their own traditional staple. - **Food Miles**: A vegan in a northern climate eating tropical fruit in winter may have a higher carbon footprint than a local omnivore consuming pastured eggs or venison. ### The Problem of Cultural Hegemony Finally, sociologists argue that universal veganism can act as a form of **cultural imperialism**. Many indigenous cultures practice **traditional animal husbandry** that is deeply integrated into their local ecosystems and spiritual identities. For the [Inuit of the Arctic](https://en.wikipedia.org/wiki/Inuit_diet) or the Maasai of East Africa, animal products are not just food; they are central to survival in environments where crop cultivation is impossible. Forcing a plant-based framework onto these cultures ignores **food sovereignty**—the right of peoples to define their own agricultural and food systems.