The Fixed Point Foundation is an American-based Christian organisation dedicated to exploring the big ideas around faith and culture. In recent years it's taken on some of the world's most outspoken critics of the Christian faith, from Christopher Hitchens to Richard Dawkins. And, when Fixed Point came to Melbourne, they staged a feisty bout between Australian bio-ethicist and atheist Peter Singer and Oxford Maths Professor and Christian John Lennox. While the event stayed polite and peaceful there were some heavy intellectual punches thrown. Singer cites the Roman Catholic Church and its policy on condoms and the resulting loss of lives from AIDS as a good reason not to believe in God ... while Lennox says Communist Russia proved that being deliberately godless can be just as disastrous Specifically the God of the bible. Peter Singer is Ira W DeCamp Professor of Bioethics in the University Center for Human Values at Princeton University and laureate professor at the Centre for Applied Philosophy and Public Ethics at the University of Melbourne. He first became well-known internationally after the publication of "Animal Liberation". His extremely controversial views on animal rights and other issues in bioethics have received much attention over many years. Singer's other books include "Democracy and Disobedience", "Practical Ethics", "The Expanding Circle, Should the Baby Live?", "How Are We to Live?, Rethinking Life and Death", "Ethics into Action: How Ethical is Australia?", "The Way We Eat" and "The Life You Can Save". John Lennox is Professor in Mathematics at the University of Oxford and Fellow in Mathematics and Philosophy of Science at Green Templeton College, University of Oxford. Possessing doctorates from Oxford, Cambridge, and the University of Wales, he travels widely speaking on the interface between science and religion. Lennox has debated atheists ranging from Victor Stenger to Richard Dawkins and is the author of "God's Undertaker: Has Science Buried God?"