"In Genesis 6 God gives the reason for His judgement of the world in the days of Noah:
Then the Lord saw that the wickedness of man was great in the earth, and that every intent of the thoughts of his heart was only evil continually. . . . The earth also was corrupt before God, and the earth was filled with violence. So God looked upon the earth, and indeed it was corrupt; for all flesh had corrupted their way on the earth. (Genesis 6:5, 11–12)
The judgement at the time of the Flood was not a result of God’s supposed capriciousness; rather He had several reasons for His judgement:
- The wickedness of man.
- Every intent of the thoughts of man’s heart was only evil continually.
- The earth was corrupt.
- The earth was filled with violence.
- All flesh had corrupted their way upon the earth.
Despite man’s wickedness, God showed Himself to be gracious in that He patiently waited, presumably for people to repent, while the Ark was being prepared (1 Peter 3:20).
Unfortunately, despite the testimony of Noah, a preacher of righteousness (2 Peter 2:5, Hebrews 11:7), the people went about their daily affairs, unconcerned and unsuspecting of the Flood that came and destroyed them (Matthew 24:39)." AIG/S.Turpin