Koomi's theory was that gods come into being and grow and flourish because they are believed in. Belief itself is the food of the gods. Initially, when mankind lived in small primitive tribes, there were probably millions of gods. Now there tended to be only a few very important ones-local gods of thunder and love, for example, tended to run together like pools of mercury as the small primitive tribes joined up and became huge, powerful primitive tribes with more sophisticated weapons. But any god could join. Any god could start small. Any god could grow in stature as its believers increased. And dwindle as they decreased. It was like a great big game of ladders and snakes.
Gods liked games, provided they were winning.
~T. Pratchett.
