The leaders of the United States, Australia, India, and Japan held their fourth Quad meeting in May. After a year dedicated to fighting the pandemic, here’s what they pledged to take on next.

Amid renewed calls for changes in the world order, U.S. President Joe Biden sought to stress his support for greater inclusion of developing nations in addressing economic, social, and climate concer…

Climate change is fueling geopolitical competition in the Arctic. An independent Greenland could play an important role in years to come.

Biden has moved to rejoin the Paris Agreement and the World Health Organization. They likely won’t be the last international agreements and institutions that the United States reenters.

Scientists say the rain forest is approaching a critical tipping point at which the damage is irreversible.

The main battle tanks that the United States and Germany have agreed to provide Ukraine will help its forces punch through Russian fortifications and retake lost territory.