The Covid-19 epidemic saw the rapid and almost unprecedented erasure of the United States on the international scene in a matter of months. Dedicated since the election of Donald Trump to a transactional vision of international relations, their institutions paralyzed by a deep political divide, the Americans had revived for a few years with their old isolationist tendencies. This trend suddenly accelerated and accentuated with the coronavirus health crisis. The glaring absence of the United States from all attempts to coordinate a global response to the greatest contemporary pandemic already appears to be a turning point of historic magnitude [ . . . ]