1. John Quincy Adams –IQ score: 168.75

John Quincy Adams, America’s sixth president (1825–1829), boasts the highest recorded IQ of any U.S. president at 168.75. While studying law at Harvard, he faced a romantic crossroads but heeded his parents’ advice to prioritize his career over marriage.

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This focus paid off: Adams became one of the nation’s most accomplished leaders. A master diplomat, he negotiated the Treaty of Ghent to end the War of 1812, settled border disputes with Britain, and secured Florida from Spain. His legacy of intellect and dedication to public service makes a compelling case for choosing duty over personal desires—a decision that shaped the course of American history.

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