New Defender's Study Bible Notes
6:11 filled with violence. In order to be “filled” with violence, the earth by this time had become filled with people.
6:12 all flesh. Since “all flesh,” as destroyed in the Flood, included animals (Genesis 7:21), some have suggested that animals also had “corrupted their ways” and were contributing to the worldwide violence. This is doubtful, since animals do not make moral judgments. However, as a part of man’s dominion, they shared in his curse and now in the judgment of the Flood. This verse may possibly imply the development of carnivorous appetites and increasing hostility to man by the animals.
6:13 with the earth. God did not promise to destroy man from the earth, but with the earth. The physical earth-system itself, as man’s home and dominion, must share in his judgment. The Flood obviously was to be global and cataclysmic, not local or tranquil, as many modern compromising Christians have sought to interpret it.