Regionalism is important to you because it has been proven to increase the efficiency and effectiveness of local governments. More efficient government helps keep taxes and fees lower. Lastly not every issue is better solved through a regional approach and in fact there are many instances where it just cannot work.
An advantage of regionalism include having individuals learn their roles in the community. one disadvantage of regionalism is that it can be too inclusive and keep new individuals out.
I hope it's help just pick 1 or both of them ok if you have a problem just comment