The towns to the south of San Francisco—which weren’t called Silicon Valley until the 1970s—were the epicenter of this revolution because they combined scientific expertise, manufacturing know-how, and visionary business thinking. California had plenty of engineers trained in aviation or radio industries who’d graduated from Stanford or Berkeley, each of which was flush with defense dollars as the U.S. military sought to solidify its technological advantage. California’s culture mattered just as much as any economic structure, however. The people who left America’s East Coast, Europe, and Asia
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