What Im asking is, how can people with certain traits be considered 'German" or 'Austrian', or a certain type of sausage belong to a certain nation, when they are all so close together with nothing holding them apart but borders? It seems as though everyone would look the same, because the geography is practically the same compared to the extreme corners. Also, with more open borders, how can a national's traits remain the same and not be all mixed into one type of person with all the same features? Was I clear enough?