Tribalism has been part of every nation from the beginning of civilization.  Traditional tribalism was influenced by a common geography, ethnicity, particular religious cultic practices, common customs and heritage. The most influential form of tribalism today is ideological tribalism; groups united by the same core beliefs with the same common enemy. This type of tribalism is alive and well in politics today and the biggest danger of polarized tribalism is totalitarianism from either polarized extreme.