One of the things that sets us apart from non-human animals is that animals produce only and exactly what they need; humans invariably produce more. We are creatures of excess, and this is what makes us simultaneously the most creative, and most destructive, of all species. Ruling classes are simply those who have organized society in such a way that they can extract the lion’s share of that surplus for themselves, whether through tribute, slavery, feudal dues or manipulating ostensibly free-market arrangements.
