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.
"That genetic change can at least partly avoid the price of imposing rigidity on the system by being delayed until it is probable that the circumstance which was coped with by the soma at a reversible level is indeed permanent and by acting only indirectly on the phenotypic variable. The genetic change presumably shifts only the bias or setting (see Glossary, "Logical Type") of the homeostatic control of the phenotypic variable." (Bateson, G. (1979) Mind and Nature. Bantom Books: Toronto p. 175)