Human evolution theory utilizing concepts of neoteny & female sexual selection
An etiology of neuropsychological disorders such as autism and dyslexia, and the origin of left handedness.
"As with handedness and marital status, the patterns do not match those for the total sample. For example, among white males, the highest proportions for each handedness group is: Lefts and Rights, Jews: Left Mixeds, None: and Right Mixed, Protestants." (Lansky, LM, Feinstein H, & Peterson JM (1988) Demography of handedness two samples of randomly selected adults (N = 2083). Neuropsychologia 26: 474) [note: Jews polarized to the left right extremes]
"Demographic information, including sexual, religious, social and ethnic backround, and marital status, as well as birth, developmental, and family history, was collected for 34 patients with Gilles de la Tourette's syndrome, and compared with the findings in six studies and four reviews. Males outnumbered females at all ages in a ratio of three or four to one. Sixty-seven per cent had an East European Jewish backround. More females were married than males. There was no relationship between Tourette's syndrome and mother's age at birth, history of abortions, birth history, birth order, family history of tics and mental illness, and social class. In 60 per cent of the cases, one of the parents had paranoid or dominiant characteristics, higher than might be expected. Childhood developmental abnormalities were found in 51.8 per cent of the patients and 35.3 per cent were left-handed. These findings suggested a relationship between Tourette's syndrome and early central nervous system difficulty." (Shapiro, A.K., Shapiro, E., Wayne, H. (1972) Birth, developmental, and family histories and demographic information in Tourettes syndrome. J Nerv Ment Dis 155 (5): 335)