Quora is full of questions college students ask each other while high, except that sometimes they get answered seriously. Case in point: What is the political situation in the Mario universe? The top answer starts out:
Without going into too much detail, Mario generally lives and works in the Mushroom Kingdom, one of the largest geo-political structures on Mushroom World, in the Grand Finale Galaxy in, yes, the Mushroom Universe.
For the purposes of this answer I will deliberately restrict the terms to discussing Mushroom World, as a comprehensive answer on the entire Mushroom Universe would require covering 20-22 (depending on how you count) Galaxies and frankly, I doubt it would be any more fun to read than it would be to write.
Also, Bowser is probably a fascist.