Japan's constitutional debate is about not simply the document's past but also the nation's ability to respond to twenty-first-century challenges.

Population growth and aging are fueling a spectacular rise in noncommunicable diseases, such as cancers and cardiovascular diseases, in poor countries that are ill-prepared to handle them. 

An in-depth, multimedia look at climate change, its global impact, and efforts to combat it.

Elections throughout the world in 2012 brought several countries to a crossroads as they struggled with the eurozone debt crisis, the formation of post-Arab Spring governments, and recovery from econ…