In 1999 he became a professor at Princeton University's Center for Human Values. Singer is regarded as a rationalist. He supports a philosophical system based on reason rather than on sentiment, self-interest, or social conditioning. He has taken a preference utilitarian approach to the ethical issues involved in embryo experimentation, genetic engineering, surrogate motherhood, abortion, and euthanasia. This approach regards an action as ethically correct if it satisfies the preference of those affected and has the best consequences for the greatest number of people.
Singer also rejects the idea that killing is wrong regardless of the circumstances.
Singer has published several books. His opposition to the mistreatment of animals has been influential in stopping some inhumane testing of animals by large corporations. Singer has donated the royalties from his books to international aid causes and the animal liberation movement. He has given between 10 and 20 percent of his income to the poor, believing that the rich have an ethical duty to help the undeprivileged. All rights reserved.