Wandering the National Mall last week in Washington DC I was frequently in the shadow of war memorials that seemed not just monuments to those lost but also to how the conflicts reshaped America – the Civil War ending slavery, World War Two bringing about the apogee of FDR’s New Deal, and Vietnam shattering the New Deal consensus.

Now coronavirus already looks set to impose costs comparable to a war. Donald Trump is already set to reach for a Korean War era law to boost production of key medical supplies.