Technological progress can keep improving descendants’ lives, while opposing administrations can reverse policy gains, making economic growth politically durable.

A 225-fold income increase predicts only about three extra happiness points on a 1–10 scale.

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U.S. output per capita is roughly 900 times pre-agricultural levels and 225 times levels around 1…

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Across incomes from $10,000 to over $500,000 annually, happiness and log income correlate at…

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Economic growth generated about three happiness points since medieval times, while major policy…

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Finland and Israel score 0.5–1 happiness points above the U.S. after adjusting for wealth, despite…

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Without a technological singularity, standard economic-growth projections reach the limits of…

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U.S. happiness wandered through 1970–2020, then fell abruptly, rather than peaking in the 1970s…

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Medieval England around 1000 AD had GDP per capita resembling modern Burundi’s, with reported…

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