In say the American context race does basically match ancestral origin in the first approximation. Say African Americans are a hybrid population of West Africans and North-Western Europeans. Or for example European Americans are mostly North Western Europeans mixed in with a bit of Southern and Eastern European. The Hispanic category (which isn't even a race) is basically an euphemism for Mexican American (who the majority of US Hispanics are) which is because of economic differences between Mexico and the US and the pattern of migration basically a euphemism for Mestizo (which as a European-Native American hybrid population with a relatively uniform amount of admixture does make sense as a biological entity).
Not only that, those who have older roots on the continent may have gone through common selective pressures. To quote Gregory Cochran
Amish in Lancaster County, Ashkenazi Jews as a merchant/scribe caste, Tibetans & altitude, pastoralists and lactase tolerance, hunter-gatherers -> peasants : every significant, lasting ecological change creates an altered human population, different in both body and mind.
Today's post, Why Are Individual IQ Differences OK? was originally published on 26 October 2007. A summary (taken from the LW wiki):
Discuss the post here (rather than in the comments to the original post).
This post is part of the Rerunning the Sequences series, where we'll be going through Eliezer Yudkowsky's old posts in order so that people who are interested can (re-)read and discuss them. The previous post was No One Knows What Science Doesn't Know, and you can use the sequence_reruns tag or rss feed to follow the rest of the series.
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