Here’s a report that in Parkinson’s Disease patients, as the frontal lobe becomes impaired, personality veers toward “Machiavellianism” — or self-centered-ness coupled with lack of concern for others. Nicollo Machiavelli     Cognit Neuropsychiatry. 2007 Jul;12(4):285-300.Links “Machiavellianism” and frontal dysfunction:…

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