Things exist either because they have recently come into existence or because they have qualities that made them unlikely to be destroyed in the past.

It would be really worrying if, as a Darwinian, it was impossible to think of ways in which our behavior could be explained.

One of the possible reasons why we might be good is that we're frightened, frightened of God. We want the reward in Heaven, we don't want to go to Hell. That would be an ignoble, ignominious reason for being good, and I think that if anybody was good to you just because they hoped for a heavenly reward, you wouldn't respect them, you'd probably give them a wide berth.

Even if it were true that we need God to be moral, it would of course not make God's existence more likely, merely more desirable (many people cannot tell the difference)

Some sort of belief in all-powerful supernatural beings is common, if not universal. A tendency to obey authority, perhaps especially in children, a tendency to believe what you're told, a tendency to fear your own death, a tendency to wish to see your loved ones who have died, to wish to see them again, a wish to understand where you came from, where the world came from, all these psychological predispositions, under the right cultural conditions, tend to lead to people believing in things for which there is no evidence.

What I am skeptical about is the idea that whatever wonderful revelation does come in the science of the future, it will turn out to be one of the particular historical religions that people happen to have dreamed up.

You can't understand European history at all other than through religion, or English literature either if you can't recognise biblical allusions.