I feel like in the U.S where I was born and raised there are definable personality archetypes which fall into obvious stereotypes such as a dry as dust country type accent and life-style, snob, ultra conservative old woman etc What I want to know is if these behaviors have been catalogued and defined. For instances, writers have alleged that there are 11 different "nations" in the United States.
What are their bases and why do people conform so rigidly to these types?