Feeds that amplify hysterical content are accelerating extremism and a grievance society that endangers us all. Media personalities and online influencers who sow social division for a living, blame the rise of assassination culture on Antifa and MAGA. Meanwhile, tech CEOs gin up fears of an AI apocalypse. But they’re both smokescreens hiding a bigger problem. Algorithms decide what we see, and in trying to win their approval, we’re changing how we behave.