I think it's perfectly possible to explain how the universe came about without bringing God into it, but I don't know everything, and there may well be a God somewhere, hiding away. Actually, if he is keeping out of sight, it's because he's ashamed of his followers and all the cruelty and ignorance they're responsible for promoting in his name. If I were him, I'd want nothing to do with them.
Lord, if I thought you were listening, I'd pray for this above all: that any church set up in your name should remain poor, and powerless, and modest. That it should wield no authority except that of love. That it should never cast anyone out. That it should own no property and make no laws. That it should not condemn, but only forgive. That it should be not like a palace with marble walls and polished floors, and guards standing at the door, but like a tree with its roots deep in the soil, that shelters every kind of bird and beast and gives blossom in the spring and shade in the hot sun and fruit in the season, and in time gives up its good sound wood for the carpenter; but that sheds many thousands of seeds so that new trees can grow in its place. Does the tree say to the sparrow, 'Get out, you don't belong here?' Does the tree say to the hungry man, 'This fruit is not for you?' Does the tree test the loyalty of the beasts before it allows them into the shade?
There are two great powers and they've been fighting since time began. Every advance in human life, every scrap of knowledge and wisdom and decency we have has been torn by one side from the teeth of the other. Every little increase in human freedom has been fought over ferociously between those who want us to know more and be wiser and stronger, and those who want us to obey and be humble and submit.
Religion begins in story. Yes, it does, because religion is an attempt to make sense of what is incomprehensible to us, what is inexplicable, what is awe-inspiring, what is frightening, what moves us to great wonder, and so on. That is the religious impulse, and it is part of our psychological makeup -- of everyone's psychological makeup.