While considering the possibility that Davy Jones was an evil king that Imu usurped, I started wondering if it's possible that a number of the races the World Government has attempted to discriminate and genocide, the lunarians, buccaneers, etc., might have actually been involved in committing some fucked up shit during the Void Century, and the genocides are retaliation. It could bring back one of Oda's own morals, on an enormous scale.