The Hypomanic Edge by John D. Gartner

Argues that a disproportionate number of American entrepreneurs, financiers and political leaders share a hypomanic temperament—marked by high energy, relentless optimism, impulsiveness and grand visions—which has driven innovation, risk-taking and rapid economic expansion in the United States while also producing speculative manias, personal instability and boom-and-bust cycles; combines clinical observations with historical case studies to show how this trait has shaped national institutions, markets and cultural attitudes.

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