This is my thereoy of how minecraft came like this fromt the normal to creepers and evil mobs. The zombies are humans dead and the skeleton are people with there skins melted off and creepers are people that were mutated by sciencetist to make the perfect soldier. Spiders well you get the idea the where grown. Endermen were made unknown. Scientests are not sure where they started. Now how it started like this. Everyone thinks it was something that ended it but i think when these muttations where let out they killed everyone because someone made them programed to kill humans but they messed up and they now kill any human. Steve is the only human that was here. Villagers do not count as humans. They dont look like them. Theyre aliens not humans there world was destroyed and only some made it. They found out about how this world ended and humans are gone. But when Steve showed up they think there are more but are still there. If Steve can find a female then he can continue the human race untill then he trys to survive. This is my threoy guys its not 100% right but i think its this.