The Pigman

The Pigman was a versatile creature during the early days of the overworld. Overtime they moved into the nether and the remaining Pigmen on the overworld evolved into Villagers. Meanwhile in the nether 2 groups of Pigmen split up 1 evolved into humanity the other experienced a strange disease turning them into Zombie Pigmen. Over time the Zombie Pigmen evolved into the much more cleaner Piglin some Piglins remained with the disease leaving them as Zombie Piglins.