Daron Acemoglu (MIT), Georgy Egorov (Northwestern), and Konstantin Sonin (CEPR): A Political Theory of Populism. Mathias O. Royce (SMC): The Rise and Propagation of Political Right-Wing Extremism: The Identification and Assessment of Common Sovereign Economic and Socio-Demographic Determinants. From Edge, who gets to keep secrets? The question of secrecy in the information age is clearly a deep social (and mathematical) problem, and well worth paying attention to. Kathryn Schulz on 2010: The year in mistakes. Five years in, gauging impact of Gates grants. Putting the "American business model" in its place: The key to understanding why market economies have outperformed planned societies is not recognition of the ubiquity of greed, but understanding of the power of disciplined pluralism. A review of The Arabs and the Holocaust: The Arab-Israeli War of Narratives by Gilbert Achcar. Cartoonist Darryl Cunningham investigates climate change. The deep pain of awkward silences: Remarks that stop the conversation cold at social gatherings can instantly elicit deep-seated feelings of exclusion. From NYRB, Ahmed Rashid on the way out of Afghanistan. The American Wikileaks Hacker: Jacob Appelbaum fight repressive regimes around the world — including his own. Rachel Botsman says we're "wired to share" — and shows how websites like Zipcar and Swaptree are changing the rules of human behavior.