A thread to discuss the political implications of what is known or scientifically understood or appears to be the case regarding this topic. I opted for the politics thread, partly because as I understand it there is no consensus on much of the science and partly because it is the political aspects and implications that I am especially interested in. Obviously, biological science and genetics may also come into play. I myself am not an expert in those areas.
I have chosen to focus on race in particular, though the general subject, and the nature/nurture aspects, could be looked at or affect other areas too (gender might be an alternative focus) and into socioeconomics generally.
Here, to start the ball rolling is what I thought was an interesting article from The New York Times in 2006.....
After the Bell Curve
https://www.nytimes.com/2006/07/23/...00&partner=rssuserland&emc=rss&pagewanted=all
......which begins as follows:
"When it comes to explaining the roots of intelligence, the fight between partisans of the gene and partisans of the environment is ancient and fierce. Each side challenges the other’s intellectual bona fides and political agendas. What is at stake is not just the definition of good science but also the meaning of the just society. The nurture crowd is predisposed to revive the War on Poverty, while the hereditarians typically embrace a Social Darwinist perspective."
To put my head on the chopping block, I'm going to adopt the starting position that intelligence is most likely partly a result of nature and partly of nurture, and that there is (in any one lifetime and in any current society) and was (historically/ancestrally/globally) a complicated interplay of both.
This is somewhat related to my reply to barbos above.
It is critical to keep in mind that the evidence of genetic influence is solely for explaining within group or individual level variability in intellectual performance. That has no direct implication for the source of differences between groups.
At the group level, most things that vary within groups or at the individual level are canceled out, b/c most variance is random and thus cancels when aggregated.
Take two random people and they will likely differ in height, skin tone, and countless other physical traits. Take a thousand people and randomly divide them into groups and the groups will not differ in height, skin tone and any of those countless physical traits.
So a priori, the odds that two groups differ on a genetic feature that varies among individuals is very low. The same goes for the a priori odds of a difference in an environmental feature which varies among individuals. However, racial groups are not random and we have direct evidence that many likely relevant environmental features that impact intellectual development do vary systematically between racial groups (and sex groups). But we have little if any evidence that those racial groups differ in the countless genes (all of which vary randomly) in a systematic way across each relevant gene in the manner required to produce a difference in an observed trait like intelligent behavior.
The evidence that gene-based racial intelligence proponents point to is the existence of a group level difference in observed intelligence behavior, but for the above reasons that provides no evidential support for that claim. Until the actual genes themselves responsible for intelligent behavior are observed to differ on average between racial groups, there will be no good evidence that racial differences in intelligence are genetically based. And this requires not just finding a differences in one relevant gene, but a systematic difference in the same direction among most genes that impact intelligent behavior. Since we aren't close to knowing all or even many of the specific genes involved, we aren't close to having any evidence of gene-based intelligence differences between the races.
Thanks.
You know more than me about genetics, obviously.
But from a layman's perspective...
Setting race aside, the idea that intelligence is heritable (directly via genes I mean) seems more than plausible (and quite well supported).
So, if that's true (and I did use the word if) then, if, also, the (for want of a better word) breeding is segregated, at least quite a bit, then, wouldn't one expect to see.... certain patterns emerge, among groups?
ETA: I hadn't read your reply to Moogly before posting, and although I don't fully understand it, it seems as if you may have touched on what I just said?
This is where the discussion gets blocked. We fully accept this for all other life but humans. Instead, we take a page from the Intelligent Design lobby and view humans as special; that evolution and natural selection are true - but not the politically uncomfortable parts. For those we imagine that nature inexplicably follows the contours of the preferred political dogma. And that dogma will be enforced.