They sold this promise of technology as a way of freeing humanity, but it was about doing the opposite. They flooded Silicon Valley with money until a computer was in every pocket. They funded the invention of social media to track everyone, to know what they liked and believed. Then they corrupted those beliefs, played them back to people in their own echo chambers. And slowly humanity became polarized. It was ‘us versus them,’ and neither side was able to even listen to the other without prejudgment.”