Singer is an atheist. He was a speaker at the 2012 Global Atheist Convention.[43] He has debated with Christians such as John Lennox[44] and Dinesh D'Souza.[45] Singer has pointed out the problem of evil as an objection against the Christian conception of God. He stated: "The evidence of our own eyes makes it more plausible to believe that the world was not created by any god at all. If, however, we insist on believing in divine creation, we are forced to admit that the god who made the world cannot be all-powerful and all good. He must be either evil or a bungler."[46] In keeping with his considerations of non-human animals, Singer also takes issue with the original sin reply to the problem of evil, saying that, "animals also suffer from floods, fires, and droughts, and, since they are not descended from Adam and Eve, they cannot have inherited original sin."[46]