As Iran investigates the assassination of a top nuclear scientist, fingers are already pointing at Israel and the United States, whose outgoing administration clearly wants to minimize the chances of reviving the nuclear deal.

It makes sense that a continent home to 54 countries and 1.2 billion people would also house a mass of contradictory developments. Africa features several of the world’s fastest-growing economies and a burgeoning middle class. But much of the continent remains mired in debt, ravaged by conflict, disease or terrorism, …

The coming crisis of American power that is sure to follow the November election will be unique in U.S. history.