baseline mood. Something is clearly wrong when the idea of being “normal” induces enough panic to make someone neglect the people they love in favor of the possible admiration of strangers. But it is strikingly common among some of history’s greatest strivers. Take Winston Churchill, perhaps the most impactful statesman of the twentieth century. He often referred to his “black dog,” a melancholy that he treated with whiskey, obsessive work, and an unquenchable thirst for greatness. Unable to leave his tortured mind unattended during his crushing schedule as a wartime prime minister, he
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