The Simulmatics Corporation, founded in 1959, mined data, targeted voters, accelerated news, manipulated consumers, destabilized politics, and disordered knowledge - decades before Facebook, Google, Amazon, and Cambridge Analytica. Silicon Valley likes to imagine that it has no past, but the scientists of Simulmatics are the long-dead grandfathers of Mark Zuckerberg and Elon Musk. A brilliant, revelatory account of the Cold War origins of the data-mad, algorithmic twenty-first century.