And a reliable way to change social norms is to teach new social norms to the next generation!

Er, not necessarily. Local maxima can be dangerous to venture away from.

Suppose that it'd be safer for everybody to drive on the right side of the road than for everybody to drive on the left side (as a consequence of most people being right-handed), and you're living in a country where it's customary to drive on the left side. You wouldn't teach your children to drive on the right side, would you?