"call this the "bottom-up" theory of the evolution of social complexity, because it treats social complexity as a sort of "superstructure" on the material resource base. In other words, if you stir enough resources into your evolutionary pot, social complexity will inevitably bubble up. The problem with the bottom-up theory is that in several places where we can date the key stages in this process, we see a different sequence of events. The two sites with early monumental architecture that we discussed in Chapter 1, Gobekli Tepe and Poverty Point, arose before agriculture. So here we have an inverted sequence of events. First, a fairly large-scale society arises, with quite sophisticated ritual activities and buildings requiring the mobilization of large numbers of workers. Only later comes agriculture. Has the standard theory reversed cause and effect? Second, hunter-gatherer societies share food."