Philosopher Dan Dennett calls for religion -- all religion -- to be taught in schools, so we can understand its nature as a natural phenomenon. Then he takes on The Purpose-Driven Life, disputing its claim that, to be moral, one must deny evolution.
Philosopher and scientist Dan Dennett argues that human consciousness and free will are the result of physical processes and are not what we traditionally think they are. His 2003 book Freedom Evolves explores the way our brains have evolved to gives us -- and only us -- the kind of freedom that matters, while 2006's Breaking the Spell examines religious belief through the lens of biology.
http://www.ted.com/talks/lang/en/dan_dennett_s_response_to_rick_warren.html