The Simulmatics Corporation, founded in 1959, mined data, targeted voters, accelerated news, manipulated consumers, destabilized politics, and disordered knowledge—decades before Facebook, Amazon, and Cambridge Analytica. Although Silicon Valley likes to imagine that it has no past, the scientists of Simulmatics are almost undoubtedly the long-dead ancestors of Mark Zuckerberg and Elon Musk—or so argues Jill Lepore, distinguished Harvard historian and New Yorker staff writer, in this “hilarious, scathing, and sobering” (David Runciman) account of the origins of predictive analytics and behavioral data science.