Besides the Klitschkos who easily have 10x the intelligence than any fighter in history has, who else is extremely smart and well educated?
Lennox Lewis Barrera is pretty smart but he is an *******. I second foreman, at least in terms of having a good business sense. Plus he hasnt gone broke since he cashed in during the 90s. DLH is smart, calculating in terms of business. Mayweather is a good self promoter but I have a feeling he will go bankrupt some day. They didnt sign with Don King, they still have most of their money. Ditto for Lewis. They speak several languages, they dont get fat between fights.
I guess getting a PHD is so easy that nobody tried for what the Klitschko's got. Also, just hear their interviews. They are the most articulate and intelligent men the sport has ever had. Very classy, knows many languages, never is cocky, and is charming. That great combination makes them smart.