Speciesism is a term used in philosophy regarding the treatment of individuals of different species. The term has several different definitions within the relevant literature. A common element of most definitions is that speciesism involves treating members of one species as morally more important than members of other species in the context of their similar interests. Some sources specifically define speciesism as discrimination or unjustified treatment based on an individual's species membership, while other sources define it as differential treatment without regard to whether the treatment is justified or not. Richard Ryder, who coined the term, defined it as "a prejudice or attitude of bias in favour of the interests of members of one's own species and against those of members of other species." Speciesism results in the belief that humans have the right to use non-human animals, which scholars say is pervasive in the modern society. Studies increasingly suggest that people who support animal exploitation also tend to endorse racist, sexist, and other prejudicial views, which furthers the beliefs in human supremacy and group dominance to justify systems of inequality and oppression.
In environmental philosophy, environmental ethics is an established field of practical philosophy "which reconstructs the essential types of argumentation that can be made for protecting natural entities and the sustainable use of natural resources." The main competing paradigms are anthropocentrism, physiocentrism, and theocentrism. Environmental ethics exerts influence on a large range of disciplines including environmental law, environmental sociology, ecotheology, ecological economics, ecology and environmental geography.
Anthropocentrism is the belief that human beings are the central or most important entity in the universe. The term can be used interchangeably with humanocentrism, and some refer to the concept as human supremacy or human exceptionalism. From an anthropocentric perspective, humankind is seen as separate from nature and superior to it, and other entities are viewed as resources for humans to use.
Gary Lawrence Francione is an American academic in the fields of law and philosophy. He is Board of Governors Professor of Law and Katzenbach Scholar of Law and Philosophy at Rutgers University in New Jersey. He is also a visiting professor of philosophy at the University of Lincoln (UK) and honorary professor of philosophy at the University of East Anglia (UK). He is the author of numerous books and articles on animal ethics.
Tom Regan was an American philosopher who specialized in animal rights theory. He was professor emeritus of philosophy at North Carolina State University, where he had taught from 1967 until his retirement in 2001.
Ecocentrism is a term used by environmental philosophers and ecologists to denote a nature-centered, as opposed to human-centered, system of values. The justification for ecocentrism usually consists in an ontological belief and subsequent ethical claim. The ontological belief denies that there are any existential divisions between human and non-human nature sufficient to claim that humans are either (a) the sole bearers of intrinsic value or (b) possess greater intrinsic value than non-human nature. Thus the subsequent ethical claim is for an equality of intrinsic value across human and non-human nature, or biospherical egalitarianism.
Animal rights is the philosophy according to which many or all sentient animals have moral worth independent of their utility to humans, and that their most basic interests—such as avoiding suffering—should be afforded the same consideration as similar interests of human beings. Broadly speaking, and particularly in popular discourse, the term "animal rights" is often used synonymously with "animal protection" or "animal liberation". More narrowly, "animal rights" refers to the idea that many animals have fundamental rights to be treated with respect as individuals—rights to life, liberty, and freedom from torture that may not be overridden by considerations of aggregate welfare.
Paul W. Taylor was an American philosopher best known for his work in the field of environmental ethics.
Animal ethics is a branch of ethics which examines human-animal relationships, the moral consideration of animals and how nonhuman animals ought to be treated. The subject matter includes animal rights, animal welfare, animal law, speciesism, animal cognition, wildlife conservation, wild animal suffering, the moral status of nonhuman animals, the concept of nonhuman personhood, human exceptionalism, the history of animal use, and theories of justice. Several different theoretical approaches have been proposed to examine this field, in accordance with the different theories currently defended in moral and political philosophy. There is no theory which is completely accepted due to the differing understandings of what is meant by the term ethics; however, there are theories that are more widely accepted by society such as animal rights and utilitarianism.
Contemporary debates about animal welfare and animal rights can be traced back to the ancient world. Records from as early as the 6th century before the common era (BCE) include discussions of animal ethics in Jain and Greek texts. The relations between humans and nonnhumans are also discussed in the books of Exodus and Genesis, Jewish writings from the 6th or 5th century BCE.
The Case for Animal Rights is a 1983 book by the American philosopher Tom Regan, in which the author argues that at least some kinds of non-human animals have moral rights because they are the "subjects-of-a-life," and that these rights adhere to them whether or not they are recognized. The work is considered an important text within animal rights theory.
Deep ecology is an environmental philosophy that promotes the inherent worth of all living beings regardless of their instrumental utility to human needs, and the restructuring of modern human societies in accordance with such ideas.
Biocentrism, in a political and ecological sense, as well as literally, is an ethical point of view that extends inherent value to all living things. It is an understanding of how the earth works, particularly as it relates to its biosphere or biodiversity. It stands in contrast to anthropocentrism, which centers on the value of humans. The related ecocentrism extends inherent value to the whole of nature.
Sentiocentrism, sentio-centrism, or sentientism is an ethical view that places sentient individuals at the center of moral concern. Both humans and other sentient individuals have rights and/or interests that must be considered.
Wild animal suffering is the suffering experienced by nonhuman animals living outside of direct human control, due to harms such as disease, injury, parasitism, starvation and malnutrition, dehydration, weather conditions, natural disasters, and killings by other animals, as well as psychological stress. Some estimates indicate that these individual animals make up the vast majority of animals in existence. An extensive amount of natural suffering has been described as an unavoidable consequence of Darwinian evolution and the pervasiveness of reproductive strategies which favor producing large numbers of offspring, with a low amount of parental care and of which only a small number survive to adulthood, the rest dying in painful ways, has led some to argue that suffering dominates happiness in nature.
Animal Rights Without Liberation: Applied Ethics and Human Obligations is a 2012 book by the British political theorist Alasdair Cochrane, in which it is argued that animal rights philosophy can be decoupled from animal liberation philosophy by the adoption of the interest-based rights approach. Cochrane, arguing that there is no reason that (nonhuman) animals should be excluded from justice, adopts Joseph Raz's account of interest rights and extends it to include animals. He argues that sentient animals possess a right not to be made to suffer and a right not to be killed, but not a right to freedom. The book's chapters apply Cochrane's account to a number of interactions between humans and animals; first animal experimentation, then animal agriculture, the genetic engineering of animals, the use of animals in entertainment and sport, the relationship of animals to environmental practices and the use of animals in cultural practices.
Gary Edward Varner is an American philosopher specializing in environmental ethics, philosophical questions related to animal rights and animal welfare, and R. M. Hare's two-level utilitarianism. He is a professor in the department of philosophy at Texas A&M University, and has been based at the university since 1990. He was educated at Arizona State University, the University of Georgia and the University of Wisconsin–Madison; at Madison, where he was supervised by Jon Morline, he wrote one of the first doctoral theses on environmental ethics. Varner's first monograph was In Nature's Interests?, which was published by Oxford University Press in 1998. In the book, Varner defended a form of biocentric individualism, according to which all living entities have morally considerable interests.
The ethics of uncertain sentience refers to questions surrounding the treatment of and moral obligations towards individuals whose sentience—the capacity to subjectively sense and feel—and resulting ability to experience pain is uncertain; the topic has been particularly discussed within the field of animal ethics, with the precautionary principle frequently invoked in response.
Catia Faria is a Portuguese moral philosopher and activist for animal rights and feminism. She is assistant professor in Applied Ethics at the Complutense University of Madrid, and is a board member of the UPF-Centre for Animal Ethics. Faria specialises in normative and applied ethics, especially focusing on how they apply to the moral consideration of non-human animals. In 2022, she is published her first book Animal Ethics in the Wild: Wild Animal Suffering and Intervention in Nature.
Moral circle expansion is the process of increasing the number and type of entities given moral consideration over time and potentially into the future. The general idea of moral inclusion was discussed by ancient philosophers and since the 19th century has inspired social movements related to human rights and animal rights. Especially in relation to animal rights, the philosopher Peter Singer has written about the subject since the 1970s, and since 2017 so has the think tank Sentience Institute, part of the 21st-century effective altruism movement. There is significant debate on whether humanity actually has an expanding moral circle, considering topics such as the lack of a uniform border of growing moral consideration and the disconnect between people's moral attitudes and their behavior. Research into the phenomenon is ongoing.
