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This post was edited by Flavonoids at 2014-6-28 16:49|
snowipine Post time: 2014-6-22 19:57
Man have to consider the future. Eugenics should come to rescue.
Something seems wrong with this article: the article says that historically, most offspring did not survive long enough to reproduce. What period is he talking about? During hunter-gatherer times? So, what, did like 95% of all offspring die constantly, and only 5% of the "fittest" survive? How does this demographically work out? So, when the first modern human was born 100,000 years ago - one child that had a mutation that rendered him a "human" - who does he breed with, another pre-human in which the children he had inherited the mutation? So let's say he has ten children and maybe 8 inherited the mutation, so now he has eight human children and two pre-human children. now, of the eight, maybe 7 die before reproducing, according to this article. So, one remaining human mates again with a pre-human, has ten children, 8 inherit the mutation, and then only ones survives to mate again.
But wait, has monogamy kicked in as yet? Probably not I think, so this original human copulates with, let's say 500 females in his lifetime, creating 500 children, but 400 inherit his mutation making them human, and 50 children then survive to reproduce. So, in the next generation, we went from one human to 50. So, we have this growth for a while, provided that these humans keep on inpregnating 500 females each.
Okay, but as humans migrate out of Africa and spread around the world, when in history do different parts of the world stop reproducing at such high a rate? I don't think that ancient Roman men impregnated that many women. And Christianity imposed monogamy on all men. So, if the typical ancient Christian had ten children (a high estimate, I think), then with most dying from from mutations before they can reproduce, only one will survive. So, each generation, 90% of Europe's children will die, rendering all of Europe extinct. I don't know all the numbers, but let's say there were 100 million in Europe when Christianity became ubiquitous there. And the average lifespan was something like 35, so if my math is correct (which it probably is not), every 35 years, the population is cut in half since one out of ten children survive. So, then in the year 1000 CE, all Europeans would have been extinct.
Of course, according to Wikipedia, two-thirds of children died, so then out of ten, 3.3 would survive, so this would allow for population growth.