Well..Julian Jaynes postulated in his essay 'On the Origins of Conciousness in the Breakdown of the Bicameral Mind' that the left side of the brain influenced the role of logic and rational thought and that the right side was utterly insane-almost in a state of chronic schizophrenia..
Judging by the people I know-including my good self-and taking a peek at history and social anthropology,that seems to be a judicious judgement????????