"As Harvard historian of science Peter Galison has demonstrated, the universe of classified knowledge now far exceeds the universe of unclassified knowledge. That's a staggering thought. There is far more classified knowledge in the world than unclassified. And that disparity grows all the time."

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If Coolidge were a stock, he'd be a buy. The experts have historically ranked Coolidge in the bottom quartile or bottom half of all presidents. But his economic performance and his statesmanship suggest Coolidge belongs in the top quarter of presidents. The disparity between the Coolidge price and Coolidge value is huge. So revision is warranted.

— Amity Shlaes