God is, according to Christianity, the eternal being responsible for the upbringing of our world.
I believe God was made up by those longing for power, simply to make the people believe that God would punish them. This made it so that they could shape society any way that they wished, and therefore rule it. Perhaps God is what sparked morality. This has since been replaced by societal laws telling one how to act, thus making religion and God meaningless.
Remember, God means, "Goons On Deck" because the angels got us.