The implications of Evolution

Those knowledgable about evolutionary theory do not expect it to explain all or even most behaviors. How much of behavior is influenced by evolutionary versus acquired characteristics is still very much an open issue. As Coyote keeps telling you, most of the things you are speculating about are not accepted theories within evolution.The continuing presence of homosexuality in the animal world might superficially seem a challenge to evolution, but it's not an uncommon variation. Homosexuality might persist because small homosexual percentages in a population do not detract significantly from fitness, and I'm sure speculations exist about how some level of homosexuality in a population would in some way contribute to fitness, but this is not a settled issue within evolution at this time.--Percy

Evolution is selection of modified descendants, and you're right, from that small beginning spring many implications, but you almost seem to be asking, "What speculative implications deserve consideration?" That's too general a question.But we do know some things about some of the specific topics you mention. There are some solid hypotheses about the evolution of altruism. I don't know the current state of science concerning the evolution of homosexuality, but my guess is that there are some solid hypotheses there, too. The science behind eugenics is solid because it's just selection. The science behind race is solid, too, because that's just variation of subpopulations within a larger population. I would say the science behind intelligence and IQ has a long way to go, and that economics has nothing to do with biology but can apply the principles of evolution to things like companies and ideas.--Percy

Yes, among many other things, evolution explains how eugenics works. Physics explains how atom bombs work. Chemistry explains how pollution works. Biology explains how pathogens work. Meteorology explains how hurricanes work. On and on.--Percy

From an evolutionary perspective that is true. Poking around a little on the Internet I didn't see many strong hypotheses about the role of evolution in homosexuality, but it still easily fits within an evolutionary perspective. Mating combines the traits of two parents, and we know that those traits are variously expressed in the children. Some parental traits are expressed strongly, some weakly, some not at all. Traits from both parents might combine to be more strongly expressed, some might conflict, some might blend. The result is a great deal of variety.And the result of the genetic combination of traits for you was that homosexual traits were strongly expressed. Assuming you never have children you will not pass on your traits - they will die with you. So why do homosexual traits survive in the population? There are several possibilities, all of which may be true to varying degrees:

• Some homosexuals do have children. I know several homosexuals who were married for a while, and a couple of them have children.
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• The random combining of traits results in a certain percentage of homosexuals and it isn't affected much by selection.
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• Homosexuality isn't genetic but environmental or developmental.

--Percy

This might require some clarification. While selection is a component of evolution, the Nazis did not employ selection to cull the population of undesirable characteristics because they were advocates of evolution. They applied the same principles used by breeders to produce better breeds of cattle or sheep because they thought it would develop a superior and more pure race.--Percy