Moral Tribes - Cognitive Dissonance and the Energy Costs of Thinking - 6

I recently read Moral Tribes by Joshua Greene (https://www.amazon.com/Moral-Tribes-Emotion-Reason-Between/dp/0143126059).  It is a great book.  I recommend it to people seeking to understand how our societies my find ways to resolve moral differences.

Page 162 through 173.  Do some people excel in life because they use their pre-frontal cortex (pfc) more than others to make decisions and thus make better long term decisions?  Is it because their brains are better at reducing the energy cost of using the pfc?  The pfc is newer on the evolutionary scene, so it is probably subtly better in some people than others; but I suspect that advantage is more cultural and environmental than genetic.  I suspect that diet, exercise, and education do more to strengthen the pfc than genetics.  And, perhaps a pfc that holds few contradictions, that has fewer instances of cognitive dissonance, is more likely to attempt to think because thinking requires less energy because of the lack of cognitive dissonance.  As we experience life and learn, we create a web of our beliefs with paths leading from one belief to the next.  If we do this well, we build clear and straight paths between beliefs, and to go to any belief from any other requires little cognitive energy.  But, if our beliefs are not cohesive, if we have cognitive dissonance, it is as if we put obstacles in the path from one belief to another; and these obstacles not only slow us down, but they discourage us from making the attempt to think; they discourage us from making the attempt to get from one belief to another.  Perhaps some people don't like to be told to recycle, to eat healthy, to do these "right" things because to remember to do the right things requires more cognitive energy because they have cognitive dissonance about the value of these actions.