I'm pretty sure this is actually from Eyes on the Prize. I've got a torrent file for that here (broken link before), and I strongly suggest you grab it and seed.

Not only do we all owe this man for a large portion of the level of racial integration we have today, anyone who wants to change the world also owes him big time for the path he laid down. You want to see how it's done? Check it out.

I mean, listen to the oration. Where the hell is that kind of voice in today's turbulent and troubled times?