by Michael Aird, Staff Researcher at Rethink Priorities Starting June 22, Metaculus and Rethink Priorities Will Run the Nuclear Risk Forecasting Tournament to Improve Research and Decisions on Risks from Nuclear Weapons In 1941, no one had ever built a nuclear weapon, and most people had no idea that anyone ever might. Over the following 80 years, the Allies built such weapons, the US detonated two on cities, and scientists and engineers developed or…