He's got some radical views. Makes you think.
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The New Yorker calls him "the most influential living philosopher." His critics call him "the most dangerous man in the world." Peter Singer, the De Camp Professor of Bioethics at Princeton University's Center for Human Values, is most widely and controversially known for his view that animals have the same moral status as humans. He is the author of many books, including Practical Ethics (1979), Rethinking Life and Death (1995), and Animal Liberation (1975), which has sold more than 450,000 copies. This year he published Writings on an Ethical Life (Ecco Press) and A Darwinian Left: Politics, Evolution, and Cooperation (Yale University Press), which argues that the left must replace Marx with Darwin if it is to remain a viable force.
Singer is perhaps the most thorough going philosophical utilitarian since Jeremy Bentham. As such, he believes animals have rights because the relevant moral consideration is not whether a being can reason or talk but whether it can suffer. Jettisoning the traditional distinction between humans and nonhumans, Singer distinguishes instead between persons and non-persons. Persons are beings that feel, reason, have self-awareness, and look forward to a future. Thus, fetuses and some very impaired human beings are not persons in his view and have a lesser moral status than, say, adult gorillas and chimpanzees.
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for more . . .
http://reason.com/0012/rb.the.shtml