Charles Ellicott Commentary Genesis 6:12

"And God saw the earth, and, behold, it was corrupt; for all flesh had corrupted their way upon the earth." — Genesis 6:12 (ASV)

All flesh had corrupted his way upon the earth. —These material things were equally incapable of moral good or evil, but man had made them the instruments of working his carnal will, and because of the associations connected with them they must be effaced, or rubbed out. (See Note on Genesis 6:7.)