The animal rights movement, sometimes called the animal liberation movement, animal personhood, or animal advocacy movement, is a social movement which seeks an end to the rigid moral and legal distinction drawn between human and non-human animals, an end to the status of animals as property, and an end to their use in the research, food, clothing, and entertainment industries.
It is one of the few examples of a social movement that was created, and is to a large extent sustained academically, by philosophers.
All animal liberationists believe that the individual interests of non-human animals deserve recognition and protection, but the movement can be split into two broad camps.
Animal rights advocates, or rights liberationists, believe that these basic interests confer moral rights of some kind on the animals, and/or ought to confer legal rights on them; see, for example, the work of Tom Regan. Utilitarian liberationists, on the other hand, do not believe that animals possess moral rights, but argue, on utilitarian grounds — utilitarianism in its simplest form advocating that we base moral decisions on the greatest happiness of the greatest number — that, because animals have the ability to suffer, their suffering must be taken into account in any moral philosophy. To exclude animals from that consideration, they argue, is a form of discrimination that they call speciesism; see, for example, the work of Peter Singer.
Despite these differences, the terms "animal liberation" and "animal rights" are generally used interchangeably.
Factional division has also been characterized as that between the reformist or mainstream faction and the radical abolitionist and direct action factions. The mainstream faction is largely professionalized and focuses on soliciting donations and gaining media representation. This focus on resource mobilization, sought by means of frame alignment with dominant cultural frames, leads to compromise with targets. Actors in the reformist movement diagnose the problem as one of nonhuman animal mistreatment, offer a prognosis including welfare reform, and employ action frames that include moral shocks. It has been noted that the power of the animal rights movement in the United States is centralized in professionalized nonprofit organizations that prefer moderated goals of welfare reform and tend to be isomorphic.