John Mearsheimer (born in 1947), an American geopolitician with a realist school (states are cold monsters in a world of power relations), shocked the West by holding the United States responsible for the Russian-Russian war in Ukraine in February. According to him, the takeover of the Kiev army by US and British soldiers had made Ukraine a de facto member of NATO. The Russian invasion was defensive. He added that a victory for Moscow was certain because Ukraine was “existential” for Russia and that any difficulty would lead him to strike harder. According to this logic, Ukraine would be expendable for the United States. But Mearsheimer does not see that war is existential for the United States as well: if Russia resists, their imperial system crumbles.