As history has progressed, so has the organization form of human societies : at first humans banded together into tribes, followed by city-states, empires and finally, nation states, which have proven to be the most viable model, and the one in use today in the majority of the world. As each of the previous models had inherent failings and ended up being superseded by the next, so do nation-states : their inherent failure has been the rise of nationalism.