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The 608-page book is about the specialist hemispheric functioning of the brain. The differing world views of the right and left brain (the "Master" and "Emissary" in the title, respectively) have, according to the author, shaped Western culture since the time of the ancient Greek philosopher Plato, and the growing conflict between these views has implications for the way the modern world is ...
The theory posits that the human mind once operated in a state in which cognitive functions were divided between one part of the brain that appears to be "speaking" and a second part that listens and obeys—a bicameral mind—and that the breakdown of this division gave rise to consciousness in humans.
In her book, Personality Type: An Owners Manual, Thomson advances the hypothesis of a modular relationship between the cognitive functions paralleling left-right brain lateralization. In this approach, the judging functions are in the front-left and back-right brains, and the perception functions are in the back-left and front-right brains.
However, this definition and theory of biological basis is not universally accepted. There are many conflicting theories of personality in the fields of psychology, psychiatry, philosophy, and neuroscience. A few examples of this are the nature vs. nurture debate and how the idea of a 'soul' fits into biological theories of personality. [1]
The concept of "right-brained" or "left-brained" individuals is considered a widespread myth which oversimplifies the true nature of the brain's cerebral hemispheres (for a recent counter position, though, see below). Proof leading to the "mythbuster" of the left-/right-brained concept is increasing as more and more studies are brought to light.
On the other hand, an amoralist is entirely intelligible to the motivational externalist, because the motivational externalist thinks that moral judgments about what is right do not necessitate some motivation to do those things that are judged to be the right thing to do; rather, an independent desire—such as the desire to do the right thing ...
The explanations generated by the left-brain interpreter may be balanced by right brain systems which follow the constraints of reality to a closer degree. [ 4 ] [ 11 ] The suppression of the right hemisphere by electroconvulsive therapy leaves patients inclined to accept conclusions that are absurd but based on strictly-true logic.
The theory has been developed by a diverse group of collaborators and popularized in Haidt's book The Righteous Mind. [7] The theory proposes that morality is "more than one thing", first arguing for five foundations, and later expanding for six foundations (adding Liberty/Oppression): Care/harm; Fairness/cheating; Loyalty/betrayal; Authority ...