Recently some strong evidence is going the other way - and should have been mentioned. For example, collagen disorders are highly associated with a marfanoid ph

Recently some strong evidence is going the other way - and should have been mentioned. For example, collagen disorders are highly associated with a marfanoid phenotype, i.e. extreme ectomorphy, and it turns out, do correlate to personality: "Joint hypermobility syndrome was found in 67.7% of patients with anxiety disorder but in only 10.1% of psychiatric and 12.5% of medical control subjects. Patients with anxiety disorder were over 16 times more likely than control subjects to have joint laxity." http://www.edhs.info/#!about1/cs05 http://www.edhs.info/#!about1/cs05 More specifically, since the discovery of the TPSAB1-Copy-Number trait, a genetic mechanism for this (in at least many cases) has been discovered: https://www.ncbi.nlm.nih.gov/pubmed/28933792 https://www.ncbi.nlm.nih.gov/pubmed/28933792 Note the prevalence of the TPSAB1-Copy-Number trait may be over 1% of the population. Our ancestors may not have been completely wrong, after all.