It’s a shame the article itself is not freely available, but even the published abstract gives some interesting details that the CNN report didn’t mention. htt

It’s a shame the article itself is not freely available, but even the published abstract gives some interesting details that the CNN report didn’t mention. http://jech.bmj.com/content/early/2011/10/28/jech-2011-200252.abstract?sid=5d54347e-ce5e-4d55-ace4-b96e00a76727 http://jech.bmj.com/content/early/2011/10/28/jech-2011-20025... In particular the abstract makes it clear that the measured associated is independent of life-course socioeconomic position. Actually a quick search of Google Scholar throws up a number of papers on this topic, most of which seem to confirm the association reported here. This one http://personal.lse.ac.uk/KANAZAWA/pdfs/RGP2010.pdf http://personal.lse.ac.uk/KANAZAWA/pdfs/RGP2010.pdf looks quite interesting: “The Savanna-IQ Interaction Hypothesis suggests that more intelligent individuals may be more likely to acquire and espouse evolutionarily novel values than less intelligent individuals. Consumption of alcohol, tobacco, and drugs is evolutionarily novel, so the Savanna-IQ Interaction Hypothesis would predict that more intelligent individuals are more likely to consume these substances.”