Lots of people have been borrowing wartime terminology and metaphors for the current crisis. Yet it has long worried me that global leaders now belong to a generation with no memory of the second World War, never mind any direct involvement. Hardly a coincidence, perhaps, if populism and nationalism around the world are driven by people without their parents' visceral grasp of the stakes involved, when those sources of political energy overheat. Whether a pandemic-indifferent to borders, race or creed-will renew their sense of the collective interests of the species...