Animal rights

The proper treatment of animals is a very old question in the West. Ancient Greek and Roman philosophers debated the place of animals in human morality. The Pythagoreans (6th–4th century BCE) and the Neoplatonists (3rd–6th century CE) urged respect for animals’ interests, primarily because they believed in the transmigration of souls between human and animal bodies. In his biological writings, Aristotle (384–322 BCE) repeatedly suggested that animals lived for their own sake, but his claim in the Politics that nature made all animals for the sake of humans was unfortunately destined to become his most influential statement on the subject.

The fundamental principle of the modern animal rights movement is that many nonhuman animals have basic interests that deserve recognition, consideration, and protection. In the view of animal rights advocates, these basic interests give the animals that have them both moral and legal rights.

In the 3rd or 4th century CE, the Roman jurist Hermogenianus wrote, “Hominum causa omne jus constitum” (“All law was established for men’s sake”). Repeating the phrase, P.A. Fitzgerald’s 1966 treatise Salmond on Jurisprudence declared, “The law is made for men and allows no fellowship or bonds of obligation between them and the lower animals.” The most important consequence of this view is that animals have long been categorized as “legal things,” not as “legal persons.” Whereas legal persons have rights of their own, legal things do not. They exist in the law solely as the objects of the rights of legal persons—e.g., as things over which legal persons may exercise property rights.