This is something I've never quite understood - why is the MLB championship called the
World Series and the winners of the SuperBowl are called the
world champions? Who else from an international perspective did they compete against to gain these titles?

I might as well coordinate some type of sports play-off tournament here in my city and who ever wins gets declared the world champion - no, better yet, Extreme Champion of the Universe!

Seriously, shouldn't the Olympics be the proper venue for declaring true world championships? (Obviously there are other events as well, such as the World Cup...) Or is the above something we have to simply chalk up to the good old American ego?