That statement said nothing about one person, but a ruling class. Look at every primate species. They all have a hierarchy of some fashion. Do you honestly believe that our ability to be really successful at breeding and exploiting the resources around us really make us exempt from natural selection?
Social hierarchies in apes and monkeys run a huge gamut of behaviors and structures. That a hierarchy exists doesn't say anything about social structure and how that hierarchy operates.
Small group, large group, we're all monkeys.