so, you have this peculiar situation in which urbanization created crisis in one part of the world which then spread to another part of the world which is getting out of the crisis by an urbanization project of quite astonishing proportions and that history is actually there sequentially as well as geographically and i have come across it many times in the researches, the most obvious one the occasion for me, was looking at what happened between 1848 and 1871 in paris, between the revolution and the commune.