Quote:
Originally Posted by Galaico
Agrippa, would you say that a homogeneous Europid population could racially be turned into a Mongoloid population due to small Mongoloid genetic admixture (let's say 10%), if the environmental conditions were more favourable to the Mongoloid race than to the Europid one?
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Of course. Depending on the size of the population, even one individual could be enough. Its just a question of advantages-disadvantages of certain genes. Once a set of genes is present in a given population, only selection determines whether this traits will spread or not. The numbers of carriers at start only matter insofar as more carriers are a more secure start as well and a stronger base to start with, but if time and selective pressures are on the side of any trait, it will spread - thats evolution.
It goes vice versa too of course: A large portion of admixture can be of low to now significance if the selective forces were against the new foreign element. So at a certain point of time Mongoloid and Negroid admixture was of low importance in Europe and just counting respective genes without adaptive qualities means little. The result, the traits of adaptive quality which survived, matter.
Minor Negroid admixture in the Palaeolithicum would mean little because most they brought with them would be selected out and if they had just one single trait which was advantageous: Fine that they brought it with them...as long as the negative and deviating ones were eliminated, no problem. Selection can be in that way like a filter which proves, if the selective pressures are positive and performance enhancing, whats useful or harmful. Now we humans should do it, because evolution doesnt any more but rather favours the worst in our decadent society.
Evolution is a neutrum which can lead into dead ends too for a whole species - which might have had a much better chance to survive if another, once present variant, would have succeed. But evolution is neutral and has no long term perspective, the selective forces just chose whats more efficient right now. Thats why a rational and logical thinking species - or at least one in which are a lot of members who could think rational, shouldnt rely on "good luck" of the blind mother evolution but rather deciding where to go and to prevent negative deviations and one sided specialisation of their own kind.