I think the core of the rivalry has nothing to do with sports.. I think it has more to do with the fact there are two large cities in MO on opposite sides of the state, and neither is markedly better than the other, so a rivalry was born. Couple that with the fact StL people are very proud of their city and like to condescend to others about it, and KC folks become naturally defensive. Since it's smaller, they also do have an inferiority complex. There's also a lot of inter-state politicking between the cities, where both cities have lobbied for stuff at the expense of the other. (KC's new stadium deal was the most recent. I believe Enterprise, a StL company, did some heavy lobbying to stop KC from getting their new arena.) The sports are just a natural progression. The fact the world series was lost on a super controversial call exacerabted the situation. Then StL got another football team, and they quickly got better than the Cheifs (KC's major source of pride) and things got worse. To me, the KU/Mizzou thing is pretty low on the list for reasons for the rivalry for a few reasons. •Stl is more of a pro sports town than college sports. •StL's college sports loyalties are severely divided. Mizzou has the most alums, but UI and KU have large contingents. •KC is also split. It's dominated by KU, but there are tons of Mizzou fans, too. They even get regular home coverage in the paper. There are also 7 or 8 K-State fans. Whatever the source, though, there is a huge city rivalry between the two, and KC does have an inferiority complex. that made me laugh out loud.