The people of the North evolved in cold weather, and even ice-ages. Simple breeding could not allow for their survival, as in other places. They had to develop more structured societies, and work better together to make it through those long cold periods. The adaptation to those environments created good engineers, and a people who generally know how to organize a society to store enough food, and help others survive through tough times. They had to constantly wear clothes and work to survive harsh climates, so things other than dancing and penis jiggling became factors for breeding and impressing women.. Although perhaps the women secretly yearned for a time when dancing and penis jiggling to decide who breeds would return.
These are some of the factors that allowed for a part of the world that is still frozen 1/3 of the year to have the capability to feed people in places warm all year round. The people in the warm all year round places would survive without the Northerners help, however, because they are geared towards breeding to replace depleted numbers and earl aged deaths; where the Northerners breed less, but needed to teach their children more engineering like skills over time to facilitate their survival, because no matter how fast you breed, the baby will die and not breed itself if it freezes immediately. These adaptations to different environments over some thousands of years describe the differences in races and certain overall propensities, with understanding that these general differences can be radically different on individual basis. The general differences led to the general differences in the organization of societies.
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