Australian moral philosopher and University of Melbourne professor.
He studied law, history, and philosophy at the University of Melbourne from which he graduated in 1967. He also attended Preshil and Scotch College.
He was a supporter of animal liberation and popularized the term speciesism.
He married Renata Diamond in 1968 and the couple had three children: Ruth, Marion, and Esther.
He had many critics, including Steve Forbes.