Most religions were originally polytheistic,[Fact?] though some Greeks began to accept monotheism, and the ancient Egyptian religion was monotheistic for a time. Monotheism, though, can be traced back to creation, as Adam and Eve worshipped the one God.
Interestingly, even some polytheistic religions have resemblances to monotheism. For example, Hinduism believes that all the gods are ultimately part of the supreme creator-god, Brahman.
Greek pagans believed in an "unknown god", who St. Paul told the Greeks was the Christian God.
Of course, all of these religions are false.