What famous American was quoted as saying, "Revolution is good once in awhile"?

First person to answer correctly gets 10 points! Now, I am speculating that he was talking more about democratic revolution as opposed to violent revolution, but that is what this country needs! A revolution in political, judicial, economic, and spiritual matters along the lines of the democratic process and American way constrained to the Constitution,...basically COMMON SENSE and the GOLDEN RULE! Let me know what you think?