http://www.ted.com Dan Dennett is a Tufts philosophy professor and cognitive scientist, renowned for his books, Consciousness Explained (1991) and Darwin's Dangerous Idea (1995). His most recent book, Breaking the Spell: Religion as a natural phenomenon calls for a rational examination of religion as a cultural phenomenon that has co-evolved over milennia to meet human needs. In this talk, which followed the presentation by Pastor Rick Warren, he takes issue with some of Warren's claims in The Purpose-Driven Life. (Recorded February 2006 in Monterey, CA. Duration: 25:29)