Lord Acton was not quite right. Power does not just tend to corrupt as he said. Power is corrupt by its very nature. Stated in another way, only those who have a fair degree of corruption in their personal value system hanker after power. Traits that aid political success—ambition, dominance, low agreeableness, comfort with conflict, and skill at impression management—overlap with what psychologists sometimes measure as higher Machiavellianism or narcissism. This thought occurr...