That it took a hundred million years to prepare the world for him is proof that that is what it was done for. I suppose it is. I dunno. If the Eiffel tower were now representing the world’s age, the skin of paint on the pinnacle-knob at its summit would represent man’s share of that age; and anybody would perceive that that skin was what the tower was built for. I reckon they would, I dunno. —Mark Twain, “Was the World Made for Man?” 1903 Why do you believe in God? I have been asking people this question for most of my adult life. In 1998, Frank Sulloway and I presented the query in a more official format—along with the question “Why do you think other people believe in God?”—in a survey given to ten thousand Americans. Just a few of the answers we received: A 22-year-old male law student with moderate religious convictions (a self-rated five on a nine-point scale), who was raised by very religious parents and who today calls himself a deist, writes, “I believe in a creator because there seems to be no other possible explanation for the existence of the universe,”
