I believe the answer to that question is a complex web of factors that I am attempting to put into a succinct form with my social theory I call "Death of the Village". I believe that a human's natural habitat in which they thrive consists of a "village structure" (ie: "it takes a village") where everyone works together, sharing resources and doing what they, personally do best to make one organism-like community. However, capitalism in particular discourages such social structures because it relies on constant growth and if people are sharing resources and only doing what they do best, then they aren't buying as many things.