Information on the beginning of religion and its hold on Mesopotamia.
Encyclopedia Mythica entry on the resurrecting god Enki. Enki was also the high god, the god of water and wisdom, the source of knowledge, who invented civilization.
From Christopher Siren's page. Enki is lord of the abzu (the watery abyss and also semen) and of wisdom. He is the keeper of the divine law (the me). He created man from clay.