Several hundred Lebanese people protest in the northern city of Tripoli on April 17, despite the country’s coronavirus lockdown. (Ibrahim Chalhoub/AFP/Getty Images)

BEIRUT — As more than half the people in the world hunker down under some form of enforced confinement, stirrings of political and social unrest are pointing to a new, potentially turbulent phase in the global effort to stem the coronavirus pandemic.

Already, protests spurred by the collapse of economic activity have erupted in scattered locations around the world. Tens of thousands of migrant laborers stranded without work or a way home staged demonstrations last week in the Indian city of Mumbai, crowding together in defiance of social distancing rules.