Answer:
Regionalism: the theory or practice of regional rather than central systems of administration or economic, cultural, or political affiliation.
Explanation: In politics, regionalism is a political ideology focusing on the "development of a political or social system based on one or more" regions[1][2] and/or the national, normative or economic interests of a specific region, group of regions or another subnational entity,[3] gaining strength from or aiming to strengthen the "consciousness of and loyalty to a distinct region with a homogeneous population",[1] similarly to nationalism. More specifically, "regionalism refers to three distinct elements: movements demanding territorial autonomy within unitary states; the organization of the central state on a regional basis for the delivery of its policies including regional development policies; political decentralization and regional autonomy".
