Conversation so far:
What is Caddoan Mississippian regarding Mississippian culture?
The Caddoan Mississippian area is a regional variant of the Mississippian culture.
What type of variant of the Mississippian culture was Caddoan Mississippian?
The climate in this area was drier than areas in the eastern woodlands, and the lower population on the plains may have meant fewer neighboring competing chiefdoms to contend with.

Question: What does it say about Mississippi?
Self-contained rewrite: What does the Caddoan Mississippian section of the Mississippian culture article say about Mississippi?