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August 3, 2021

Middle East and North Africa
Modern Sunni-Shia Tensions

Iran’s Islamic revolution, which brought Shias to power in 1979, and the Sunni backlash have fueled a competition for regional dominance. This timeline highlights Sunni-Shia tensions in recent decade…

November 1, 2021

Energy and Environment
Oil Dependence and U.S. Foreign Policy

The United States' dependence on oil has long influenced its foreign policy. This timeline traces the story of U.S. oil development.