The Western empire collapsed , but the Eastern empire kept going strong until the 1400’s . They were already separate nations when the Western empire collapsed . The Eastern people didnt call themselves Romans anymore , they were Byzantines , as the capital of the Eastern empire was Byzantium , later capital Constantinople . In our country , some regions will remain stronger than others . I dont see Maine , going into a free for all panic , like I would in the transient Southwest , where its full of conflicting cultures and drifters from somewhere else . That is one thing I have always envied about the Japanese , they are by in large a homogeneous culture , they tolerate other cultures , but they are not really welcome .