Local officials are taking measures on their own to stop the spread of the coronavirus, as President Jair Bolsonaro downplays the crisis.

Fires in the Amazon have aroused international concern because of the rain forest’s outsize impact on climate, but political tensions are hampering the response.

Putin’s invasion of Ukraine is a geopolitical earthquake that will cause repercussions far beyond Europe. But the Russian president might be planting the seeds for the demise of his regime by overrea…

The Chinese government’s increasingly aggressive diplomacy has hurt its image in much of the world. It’s unlikely to improve anytime soon.

The United States and South Korea should pursue an expanded nuclear agreement that supports the production of civilian nuclear power and enhances extended deterrence against the North Korean threat. …