Minecraft Lore Theories
1. The Player you play as in Minecraft is an abandoned, mutated version of the Villagers. This is evidenced by the fact that the Villagers are intelligent enough to trade and keep a civilization alive, much like the Player.
2. Zombies are the corpses of the mutant Villagers who died trying to take revenge on the Villagers for abandoning them. After the death through an Iron Golem, they are revived through bacteria. These bacteria take over the corpse and consume dead skin cells. The material produced during that process goes into the production of chlorophyll, turning the corpse green. The brain is still dying, though. Short-term memory is destroyed first, meaning that only the memories of the location of villages and revengeful thoughts remain before taken over by the bacteria. All bodily functions are now working again, except a few minor muscular functions and most importantly: The production of melanin. As dead skin is recycled, light protection decreases. That causes flammable
waste from biological processes to evaporate and react with the air,
lighting the zombie on fire until its demise.
3. A higher life form is controlling the world. The explanation for this is very layered.
Reason A: Villagers do not level up by themselves. This indicates a punishment for doing so, but the punisher remains unknown.
Reason B: Skeletons can by no chance just be bones. While the existence of magic is going to be disproven in R.C, I am still going to ignore it now. Electromagnetism could be used to either move their limbs directly or control them via RF.
Reason C: Everything that has a high concentration of energy, e. g. Soul Sand, is either ionised or radioactive. High energy concentration can lead to Selective Gravity Manipulation, which would explain the Wither's ability to levitate.