What Fight Would Have Changed History The Most, If It Went The Other Way?

[BoomBoom]

I was watching the Mayweather-Marquez fight and it got me thinking. Had Marquez won, (he wasnt going to but this is purely hypothetical), he would have become an icon, and Mayweather would go from being, considered by many, to be one of the best fighters of the last 25 years, to being remembered for that loss. There are other variables of course like comebacks, how he lost, etc, but back to the topic; what fight in history would have changed the landscape of boxing the most if the other guy won? I'd have to say Ali-Frazier. That was probably one of the most significant fight during a difficult era. Had Ali won, not only would Frazier have been denied his greatest win, but 2 and 3 would likely have never happened.