Singer is well-known for his book "Animal Liberation" (1975). The book argues in favour of veganism. His essay "Famine, Affluence, and Morality" argues in favour of donating to help the global poor. He has twice served as chair of the philosophy department at Monash University. In 1996, he ran as a Greens candidate for the Australian Senate. In 2004, he was named as the Australian Humanist of the Year by the Council of Australian Humanist Societies.