Somewhere around 10,000 or so years ago something big happened to humanity. We stopped wandering around, pulling berries from shrubs and jumping out of trees onto gazelles to feed ourselves. We settled down. We chose the most desirable plants from our surroundings and cultivated them into crops that could reliably produce sustenance for us. We chose the tastiest, least dangerous animals we could find and taught them to stay in pens until we got around to slaughtering them. This moment in human history (a moment that developed over thousands of years) is called the Neolithic Revolution, and not for nothing.