Electoral results in Latin America over the past four years have led many observers of the regional/political scene to discern a left-wing surge in the hemisphere, reminiscent of the so-called “Pink Tide” that swept the area some 20 years ago. But how much do these politicians actually have in common? What implication does their ascendency have for the region? By Jorge Castañeda

Fears of global food shortages have followed Russia’s invasion of Ukraine, which has disrupted grain shipments from the major grain producer. But what about countries and regions that were suffering before this impending shortage? How is famine defined, and how is it different from simple food shortages? What if any remedies are there? By Daniel Maxwell

As climate change accelerates and drought and rising sea levels become more common, millions of people in affected regions must uproot themselves and seek safety elsewhere. Who are these affected individuals, and how might the United States aid them, and be affected by the migration? By Karen Jacobsen