Oooooh … no, not absolutely.  We need to define “prosper”.  In my mind, anything that diminishes the human family only produces an illusion of prosperity for me/my group.  The reality is that there IS no differention/discrimination between humans.  Institutionalized national groups are artifice, doomed to eventual failure.  If this were not so, at least one national group would have survived in perpetuity. 

Culture, on the other hand, is the expression of locality and language, which allows groups to experience the vibrance of how others have evolved.  When a cultural group is insecure, it defines itself as superior or “real”, thus giving rise to hitlers of one variety or another.