Extinction
Notch, tired of the server breaking from how many humans are crafting unique items, removes first generation humans from the game. He reprograms the third generation of humans to be able to only build through a crafting table and their inventories what the game itself allows and adds them back in. As a special experiment, he enables a single human per generation to retain the original crafting format. The Lurken are the only race of the first generation of humans that survive this rebooting of the world, although they lose their ability to craft unique items.