After Adam’s sin of rebellion, his children and all of the coming generations would be affected by sin, and the end result would be death. Sin and corruption “flooded” the Earth up to the point that everyone was wicked. Everyone did whatever they thought was right in their own eyes (relative morality). God, grieving over the utter depravity of society, chose to destroy the evil in the world with a global flood (Gen. 6:5-8; Gen. 6:13) and start anew with Noah, his family, and two of each kind of animal that was on the ark. Noah was a righteous man and that is why God chose him, but still, Noah had sin in his life because he was a descendant of Adam. Some may not think that it was fair for God to destroy all life. Remember that although God is love but he is also just, and he judges sin. If God let evil run rampant forever, what kind of protector would he be?