31 05 12 - 09:38They're downplaying this, but the proof that genetics works comes from the Ashkenazi Jewish population, one of the highest scorers in the average IQ game:
While several Ashkenazi Jewish mtDNA Hgs appear to derive from the Near East, there is also evidence for a low level of introgression from host European non-Jewish populations. HVS-1 sequence analysis revealed increased frequencies of Ashkenazi Jewish haplotypes that are rare or absent in other populations, and a reduced number of singletons in the Ashkenazi Jewish sample. These diversity patterns provide evidence for a prolonged period of low effective size in the history of the Ashkenazi population. The data best fit a model of an early bottleneck (approx100 generations ago), perhaps corresponding to initial migrations of ancestral Ashkenazim in the Near East or to Europe. A genetic bottleneck followed by the recent phenomenon of rapid population growth are likely to have produced the conditions that led to the high frequency of many genetic disease alleles in the Ashkenazi population. - European Journal of Human Genetics
The good part of this strategy: 100 generations ago, when it came time to choose those who were going into Europe, the Ashkenazis chose to take the top 10% of their population by intelligence. (This may have occurred naturally, as the richest traders took up new homes in their new target markets.)
Where they ran into some trouble was in the rapid expansion since; had they reproduced more slowly, there would have been more time between generations for mutations which would diminish some of those gnarly recessive traits.
If the Western world were to take its top 10% people by intelligence, health, vigor, morality and sense, and kill everyone else, the result would be a smaller Western population of much greater ability. If this population expanded slowly, it would not run into the penalties of inbreeding that we see here.
Either way, the naysayers are wrong. Eugenics works. Unless of course these naysayers want to live in a dumber population.