But you must not eat meat that has its lifeblood still in it. And for your lifeblood I will surely demand an accounting. I will demand an accounting from every animal. And from each human being, too, I will demand an accounting for the life of another human being.
Genesis 9:4-5 (NIV)
Someone recently commented that God's prohibition on eating meat with blood in it pointed to the pre-flood world being filled with people who literally ate other humans alive.
Maybe! The world was described as completely, totally wicked, and this certainly enters the imagination.