Looking at humans as domesticated apes: We are not fixed in being pair bounding or tournament species. But the current western culture is pair bounding.<p>Its typical for pair bounding domesticated apes, that the poor and uneducated breed like rats, in the hope that one of the 9 children survives and can feed me, when I'm a grandpa. The more wealth and education someone has, the less children they have, because it makes sense to have fewer children and invest more into them.<p>Till a culture runs into the problem that the average mother has less than two children. This had been a problem for every high culture, regardless if we talk about Greeks, Romans, or later high cultures. And US is not yet at this point, because CIA tells me 2.06 children per mother, while Germany has 1.41 children per mother.<p>The solution would be to get rid of the pair bounding culture, because domesticated tournament apes have exactly the opposite children per mother distribution. Rich man have several women, and those have several children. Poor man have no women, and no children.