Ethan Mollick(@emollick):The AI buildout in terms of percent of GDP is greater than the height of railroads, yet AI does not dominate the economy anywhere near as much as rail. In 1890, 1 out of every 12 men in America was employed in the railways, which used 56% of all horsepower across all machines!

Ethan Mollick

@emollick

Professor @Wharton studying AI. New book, Co-Existence, is out now: My Substack:

Joined May 2009

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Ethan Mollick@emollick

2026.09.29 00:56

The AI buildout in terms of percent of GDP is greater than the height of railroads, yet AI does not dominate the economy anywhere near as much as rail. In 1890, 1 out of every 12 men in America was employed in the railways, which used 56% of all horsepower across all machines!