How the "fierce people" came to be

Gene Expression
By Razib Khan
May 6, 2011 11:12 PMNov 19, 2019 9:42 PM

Newsletter

Sign up for our email newsletter for the latest science news
 

The pith: there are differences between populations on genes which result in "novelty seeking." These differences can be traced to migration out of Africa, and can't be explained as an artifact of random genetic drift.

I'm not going to lie, when I first saw the headline "Out of Africa migration selected novelty-seeking genes", I was a little worried. My immediate assumption was that a new paper on correlations between dopamine receptor genes, behavior genetics, and geographical variation had some out. I was right! But my worry was motivated by the fact that this would just be another in a long line of research which pushed the same result without adding anything new to the body of evidence. Let me be clear: there are decades of very robust evidence that much of the variation in human behavior we see around us is heritable. That the variation in our psychological dispositions, from intelligence to schizophrenia, is substantially explained by who our biological parents are. This is clear when you look at adoption studies which show a strong concordance between biological parents and biological children on many metrics as adults, as opposed to the parents who raised the children. This doesn't mean that environment doesn't matter, but I believe we tend to underweight genetics in individual outcomes in our contemporary Zeitgeist, just as we may have overweighted it in the past. At this point some of you may be wondering, "what, I hear about genes for [fill in the blank] constantly!" So why am I saying we underweight genetics? I think there's a disjunction between the fixation that the public (and therefore the popular press) has on a specific biophysical candidate gene which is given almost magical powers of causal necessity and the more abstract and diffuse statistical genetic reality of correlations between parents and offspring whose effects seem to be distributed diffusely across the genome. The latter is a robust and ubiquitous phenomenon, but because it is not possible to frame the narrative as a "gene for X" it lacks power. In contrast, when you have a powerful gene of large effect whose variation in state has a concrete and comprehensible outcome the narrative is clear, precise, and distinct. There's an unfortunate problem with this though:

0 free articles left
Want More? Get unlimited access for as low as $1.99/month

Already a subscriber?

Register or Log In

0 free articlesSubscribe
Discover Magazine Logo
Want more?

Keep reading for as low as $1.99!

Subscribe

Already a subscriber?

Register or Log In

Stay Curious

Sign up for our weekly newsletter and unlock one more article for free.

 

View our Privacy Policy


Want more?
Keep reading for as low as $1.99!


Log In or Register

Already a subscriber?
Find my Subscription

More From Discover
Stay Curious
Join
Our List

Sign up for our weekly science updates.

 
Subscribe
To The Magazine

Save up to 40% off the cover price when you subscribe to Discover magazine.

Copyright © 2025 LabX Media Group