The resurgence of separatism in Nigeria—a consequence of the federal government’s failure to provide security in the face of multiple threats—is stirring memories of the country’s deadly civil war.

The pandemic is exacerbating a decline of democracy across sub-Saharan Africa. To combat the trend, the United States and other partners should commit to the painstaking work of bolstering democratic…

Health and infectious diseases have shaped the history of urbanization, but it is cities that will define the future of global health.