Better vilage defence from players and mobs.

Villagers, should have better protection in their villages, more than just a iron golem. For example a new mob that will attack you if you break a villagers house or kill one of them, only when the player is still within the primeter of a villlage. Or villages have walls with archer-villagers on top of the walls making sure no hostile players or mobs get in. Also iron golems suck at keeping away mobs.