There are some problem inherent to coordinating anything on a multi-billion person scale that are monumental. You could even narrate a history of people on eart

There are some problem inherent to coordinating anything on a multi-billion person scale that are monumental. You could even narrate a history of people on earth using ability to coordinate at greater scale as your x axis. I've heard an interesting theory about homo sapien "victory" over neanderthals and other archaic humans. In some versions it's upper paleolithic culture over lower paleolithic culture of which neanderthals, early sapiens and all the grey arrears around those groups. In any case, the theory/hypothesis/narrative is that the difference between anatomically modern humans and their close cousins and homo sapiens sapiens was their ability to coordinate on larger scales than the biologically determined "band" size. Chimps, Gorillas and presumably earlier hominids live socially in groups that vary in size within a range determined by their biology. There are no chimp kings, tribes or limited liability companies, just troops and bands. Their bonding and cooperation mechanisms are based on biologically determined behavior. Environment and even culture play a role, but 250 chimps controlling a territory that would otherwise be controlled by more smaller troops is not in their repertoire. Imagine a population of archaic humans who, by use of language, religion, symbolism, abstract concepts of some unknown kind, oral history or some other means were able to coordinate 500 individuals, with 200 fighters. In a lot of contexts (the most obvious being war), that group would be at a huge advantage. These are our ancestors. It also suggests a gnarly explanation to the genetic bottleneck question. This process continues through history. Mega bands become clans and tribes and super tribes and nations and all sorts of affiliations. They get bigger and more effectively coordinated. Economic and political dynamics emerge. We get ideologies and organized religions, feudalism, socialism, slavery, capitalism, monarchy, nation states, empires, manchester united and political party nomination betting odds (BTW, Trump is at 3-1). Anyway.. food. Based on current grain prices, the daily caloric requirements of a person costs cents, ¢10-¢50, depending on what you plug into your back-of-the-envelope calculator. I'm not bringing this up as proof that caloric deficit is easily solvable, I mean the opposite. The fact that it persists in the face of this fact means that it is simply very difficult to do anything on a entire species scale. "We" here is a very tricky concept. There is no real "we" yet in the practical sense of an actor with agency.