It is said that long ago Mongorns were a community of humans, who, faced with the disintegration and subversion of Earth's society by aliens, choose the path of isolation and extreme hostility towards all outsiders. Later they contracted a beastmanhood virus and gradually reverted to the near-monkey state, both physically and mentally (however it is disputed if the latter was much of a change). Nowadays these powerful beasts live in remote, cold areas, flinging rocks and feces at everything that isn't them and looks edible. The throwing skills and exceptional cruelty are their last remaining human traits.