#Republic by Cass R. Sunstein

Divided Democracy in the Age of Social Media

An analysis of how contemporary information environments—particularly social media and personalized algorithms—encourage echo chambers and group polarization, undermining shared facts and constructive public deliberation; it draws on social science to explain why people cluster into like-minded groups and why this produces more extreme views, then argues that both platform design and public policy can and should promote cross-cutting exposure and healthier civic norms, offering practical proposals (from algorithmic tweaks to regulatory and educational interventions) aimed at reducing fragmentation while balancing free expression and democratic pluralism.

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