We can debate the existance of god for another four thousand years without completely exhausing the subject, but do you "believe in belief?"  I took this quotation from Daniel Dennett's interview on The Atheist Tapes (recommended).

"I think religion, for many people, is moral viagra.  'Some people need help being moral and don't deny it to them.'  Well, if thats true, if religion does help people lead moral lives than one should take very seriously the proposition that we're going to eliminate it and let the devil take the hindmost.  Becasue the hindmost may be a great many people, and we may have the chaos that many people fear.  Many many people want their life to have a meaning, and wheres it going to come from?"

 How much would life change today if all the religious were simultaneously disillusioned?