At a time when it has become evident that the scale of large cities makes them fragile in all areas, especially when facing an invisible virus,Thierry Paquot, author of Mesure et démesure des villes [Moderation and Excess in Cities], as well as other books on issues of contemporary urbanism, opposes the concept of the bioregion to the increasingly numerous megalopolises and the various forms of urban disaster with which we are confronted today.