John Mearsheimer (born in 1947), American geopolitician of the realist school (States are cold monsters in a world of power relations), shocked the West by judging the United States responsible for the Russian-Russian war in February. Ukrainian. According to him, the takeover of the kyiv army by the American 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 for Russia “existential” and that any difficulty would lead him to hit harder. According to this logic, Ukraine would be expendable for the United States. But Mearsheimer fails to see that the war is existential for the United States too: if Russia holds out, their imperial system crumbles.