History has taught us much about our conduct as a species but like at school, most of it was ignored or forgotten as we all sought to get laid at the school disco.

Basically its always worked on a simple principal – kill everything that doesn’t conform, isn’t edible, is edible, or might be in the way of something edible… The earliest options were to say God told you to do it, this method worked for a lot of people and everyone rallied behind you as you begun your evangelical annihilation of non believers and passive resistance, nowadays its frowned upon a little more but still applies in rare circumstances.