He called himself the Greatest, he was as much a performer as a slugger, and it took Parkinson’s Disease to slow him down — a little. Sound like an introvert to you?
The Great Introverts and Extroverts of Our Time
Herewith, TIME's unscientific survey of loud (and quiet) giants — it takes both kinds to make history. Read the related TIME cover story, "The Upside of Being an Introvert," available to subscribers here.
Muhammad Ali, Boxer
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Introverts