Because of the earth’s roundness, Genghis Khan, in the fever of possession and destruction, hastened his own overthrow by invading lands that he had already razed and conquered. Not only is it impossible to know from where we come, but also from whom we come: nothing in common, in any case, with those who pass for being the “authors of our days” – which days? Better to invent a genealogy based on pure whim and the leanings of our hearts, but what if they don’t agree?