Ethics of eating meat

The study of whether, and under what conditions, humans may morally raise and kill animals for food, weighing animal suffering, rights, human interests, and ecological effects.

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Animal rights: The view that animals have moral claims that limit how humans may use or harm them. Rights-based arguments challenge treating sentient animals as resources for food.
Sentience: The capacity to have subjective experiences, including sensations such as pain and pleasure. Whether an animal can suffer grounds many arguments about its treatment and killing.
Factory farming: A system of intensive livestock production that raises large numbers of animals in confined conditions. Its scale and confinement make it a focal case for animal-welfare objections.
Greenhouse gas emissions: Gases released into the atmosphere that trap heat and contribute to climate change. Livestock emissions make climate impact part of the ethical assessment of meat.
Peter Singer: An Australian philosopher known for influential arguments about animal liberation and applied ethics. His utilitarian critique helped bring animal suffering into mainstream ethical debate.
Utilitarianism: An ethical theory that evaluates actions by their consequences for overall well-being. It weighs animal suffering against human benefits and other consequences of meat production.
Animal welfare: An animal's physical and mental condition in relation to the circumstances in which it lives and dies. Welfare standards test whether meat production can avoid severe suffering.
Pasture-raised livestock: Livestock raised primarily on pasture rather than in intensive indoor systems. It tests whether improved living conditions can make animal agriculture morally acceptable.
Land use: The human use and management of land for purposes such as farming, housing, and conservation. Livestock production competes with other uses of land, including habitat protection.
Tom Regan: An American philosopher who argued that many animals are subjects of a life with inherent value. His rights-based case rejects using animals merely as means to human ends.