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.
The history of the regulation of animal research was a fundamental step towards the development of animal ethics, as this was when the term "animal ethics" first emerged. In the beginning, the term "animal ethics" was associated solely with cruelty, only changing in the late 20th-century, when it was deemed inadequate in modern society. The United States Animal Welfare Act of 1966, attempted to tackle the problems of animal research; however, their effects were considered futile. Many did not support this act as it communicated that if there was human benefit resulting from the tests, the suffering of the animals was justifiable. It was not until the establishment of the animal rights movement that people started supporting and voicing their opinions in public. Animal ethics was expressed through this movement and led to big changes to the power and meaning of animal ethics.
Animal rights movement
The first animal rights laws were first introduced between 1635 and 1780. In 1635, Ireland was the first country to pass animal protection legislation, "An Act against Plowing by the Tayle, and pulling the Wooll off living Sheep".