Oftentimes in popular media today, we see many themes that boil down to "human nature is to be greedy" or that "human nature is to abuse power that is given". This is not always posed as a negative thing; whether one sees it as naturalistic fallacy or not, there are those who thrive in such environments, taken to their logical conclusion in movies such as Mad Max and Fight Club. These ideas proliferate throughout most of conventional society today, and act as a general lesson that we can assume most every educated person has learned about people and the world around them. From such a place, many debates arise about the future of humanity, politics, and economy; many would say "simply look around you and you will see this to be the truth", but ideas come from places.
Given the popularity of this notion, that human nature is in and of itself selfish, where did this idea first begin? Who was the first to postulate that it is in human's very nature to abuse privilege, power, and freedom that they are given? Hume's Treatise of Human Nature springs to me as one of the most influential, and comes up on a cursory Google search of the question, but I am curious as to if anyone has further insight into the history of this idea.