Nine charts illustrate the extraordinary level of support the United States has provided Ukraine in its war against Russian invaders.

Why seeming democratic progress has failed to staunch agitation for self-determination in Nigeria.

See how six countries are faring amid efforts to protect 30 percent of the planet’s land and waters by 2030, and what will be saved if they succeed. 

Policymakers face complex cost-benefit considerations when intervening in the market to mitigate perceived risks, from climate change to competition with China.

A second Trump term could intensify the rivalry between the U.S. and China in Southeast Asia so that regional countries can no longer delicately dance between the giants.

A global surge in avian flu outbreaks in birds and some mammals is worrying poultry farmers, scientists, and health experts. The trend is provoking questions about the future of the disease and globa…