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 one pursues this subject through his multitudinous writings and the ever mounting editions of the Systema Naturae one can trace a growing uncertainty and doubt. He sees the possiblity of new species arising through crossbreeding. He confesses that he dare not decide "whether all these species are the children of time, or whether the Creator from the very beginning of the world had restricted this course of development to a definite number of species."22 He cautiously removes from later editions of the Systema the statement that no new species can arise. The fixity of species, the precise definition of the term, is no longer secure." (Eiseley, L (1958) Darwins Centry. Anchor Books: New York p. 25)