U.S. space exploration inspired a generation of students and innovators, but NASA’s role has diminished, and the number of global space competitors is growing.

The United Nations’ top leadership position has broad authority to steer the organization’s agenda, but its impact has varied widely since 1946.

The Group of Seven serves as a forum to coordinate global policy, but the Trump administration has provoked questions about the group’s cohesion and relevance.

The Group of Twenty, an informal gathering of many of the world’s largest economies, is the premier global forum for discussing economic issues. But it faces challenges from U.S. protectionism and th…

With President Donald J. Trump advocating for deep cuts to U.S. foreign aid, debate has renewed over the role of foreign assistance funds in boosting growth, promoting democracy, and saving lives.

The G20 summit comes amid tensions over trade, climate, and refugee policy and increased uncertainty over the U.S. commitment to multilateral institutions.

By withdrawing from the Paris accord, the United States—the second-largest global emitter—could undercut collective efforts to reduce emissions, transition to renewable energy sources, and lock in fu…

The Mujahedeen-e-Khalq, an exiled Iranian resistance group, continues to stir controversy despite its removal from a U.S. terrorism list.

An intense international debate over who manages parts of the internet’s technical infrastructure is likely to feed a broader discussion of internet-related public policy.

As the United States pivots to Asia, disputes over territories in the South China Sea have escalated tensions and threatened regional stability.