William Lee Miller is the Thomas C. Sorenson Professor of Political and Social Thought at the University of Virginia and author of Arguing About Slavery.

John Quincy Adams was a President of the United States and the son of a President. He was also an ambassador and jurist. His presidency was not, however, his most shining and distinguished moment upon the great stage of public life. For 17 years after his presidency, John Quincy Adams was a member of Congress. His courageous fight against slavery during that period makes him America's greatest ex-President. William Lee Miller explains why.