"Research has shown that one's level of intelligence is the single most predictive component of professional success - better than any other ability, trait, or even job experience. Yet, too often, employees are selected because of their likeability, presence, or charisma."

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I did not feel - in President [J.F.] Kennedy's words - that we could win the war for [the government in Saigon]. When I sought the reason for the dedication shown by the enemy, it seemed to me that the leadership and charisma shown by Ho Chi Minh was a major part of the answer.

— William J. Duiker