ham's mistake
In this chapter, the command to Noah and his sons is again to be fruitful and populate the earth. They do that pretty well. It's interesting because a lot of their descendents end up being enemies of Israel - like the Philistines or the descendants of Canaan. No wait, I guess many of the enemies of the Israelites were the descendants of Ham (Philistines) and especially Canaan (Hittities, Jubsites, Amorites, etc.).