Seven, there is a high correlation between contemporary regional IQs and the percentage of the population that was literate in 1880 (r=0.861). The likely explanation for this high correlation is that the percentages of the population that were literate in 1880 was a function of IQs and therefore that the regional differences in IQs were present in 1880 and have been stable over the period 1880 to 2006. This inference is confirmed by the high correlation between contemporary IQs and the statures of cohorts of military conscripts born in 1855 (r=0.918). Stature is a function of nutrition, which is itself a function of IQ.
