Re: Is it possible for man to live a moral life without religion?
Oh the things that happen when you are sleeping. Very interesting - and a thorough win by OH.
This one is pretty much wrapped up until someone argues the other side, but I'd just add a bit. I won't go long because it is pretty much the Dawkin's Argument from The God Delusion (yeah, I know - very preachy Atheist, but his arguments are mostly sound).
Simply, social animals who act against the desires of the group often find themselves on the outside of mating. Therefore, these rogue individuals either A) conform or B) do not procreate decreasing the rogue behaviour in the group. The basic need to produce offspring in a species that relies on its own members for prosperity (such as humans are) will naturally give rise to a code of morality. Religion is an effective manner to pass this morality to a larger group. Therefore, religion is more likely a product of moral teachings and not the other way around. By this, if you have morality before religion, you can have morality without religion.
More simply: we are good because we want sex.