The story of Cambridge Analytica shows how our identities and behavior have become commodities in the high-stakes data trade. The companies that control the flow of information are among the most powerful in the world; the algorithms they’ve designed in secret are shaping minds in the United States and elsewhere in ways previously unimaginable. No matter what issue you care about most—gun violence, immigration, free speech, religious freedom—you can’t escape Silicon Valley, the new epicenter of America’s crisis of perception. My work with Cambridge Analytica exposed the dark side of tech
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