Peter Singer is one of Australia's most recognised philosophers. A professor of bioethics at Princeton University, Singer was ranked number three on GDI's 'world's most influential contemporary thinkers,' and is the best selling author of books such as 'The Life You Can Save' and the seminal 'Animal Liberation.' Peter and I talk about his life-work, his father starting Melbourne's coffee boom, and his relationship with Paul Simon from Simon and Garfunkel.