Start villages.

Combine 8 emeralds with a becon in the middle of a crafting table to create the inhabiter block to start a village with custom rules like what the main trading item and who does what job and new jobs like lumberjack, miners, hunter, worriers, and cookers. They should also be able to put stuff in chests and take out and craft but remember you have to give them some starting saplies like homes and work spaces. Also laws to punish villagers that break them. Finally wars VS author villages and even pillagers.