Its actuall like divergent evolution from a common ancestor. The common ancestor was Abrahamic monotheism. Christianity considers itself the fulfillment of OT prophesy about the Messiah. Mohammed was, according to Islam, the seal of the prophets but acknowledges Jesus as a prophet and has its roots in Abraham. That area was the "cradle of civilization" due in large part to the fact that it represented a natural geological migration of humans out of the diaspora.
"A casual stroll through the lunatic asylum shows that faith does not prove anything." -Friedrich Nietzsche
"All thinking men are atheists." -Ernest Hemmingway
"Those who can make you believe absurdities can make you commit atrocities." -Voltaire
"All thinking men are atheists." -Ernest Hemmingway
"Those who can make you believe absurdities can make you commit atrocities." -Voltaire
