Comment: Re:Why isn't everyone a genius? (Score 1) 163
If being a genius, or for the sake of argument, having a high IQ, is such big advantage, why haven't we evolved to have higher IQs?
And who's to say that we have or have not evolved higher IQs? 20,000 years ago, Neanderthals weren't exactly sitting down to take baseline tests that would enable a comparison to current-man's intelligence. In 20,000 years, however, future-man will be able to run through today's IQ test and see if the average of his contemporaries is higher than that of current-man. (That is, if the differences between the culture expressed on our IQ test and his aren't so great as to make our tests meaningless to him. They're supposed to be culturally neutral, but that's nothing more than a guess about how people think in today's world, let alone 20,000 years from now.)
One thing we do know is that people choose mates likely to produce successful offspring. Think about all the factors that people consider attractive and therefore lead to mating: beauty, strength, intelligence, charm, wealth, power, courage, etc. Wealth and power are interesting because they're not necessarily inherited traits, but they provide evidence of someone who used whatever traits they had to become successful -- therefore they are likely to be good providers for their offspring.
Evolution isn't just about a single mutation. It's about the acceptance of mixing of that mutation back into the culture. People have to repeatedly demonstrate that they choose mates based on that trait for us to call it a success factor. In other words, you haven't seen it because you aren't old enough. (If you want, you can study history to try to figure out if the ancients were as smart as we are now, but that will probably yield nothing more than a debate.)
If higher IQs yield more successful people, they will eventually produce a population with higher IQs. Just don't look for results overnight. Set a reasonable timeframe.