This is the last in a three-part series of episodes about the radicalism of the Declaration of Independence and enduring importance of the American Revolution.

Whatever its authors meant by them at the time – in the summer of '76 while at war with Great Britain – the words the American revolutionaries wrote in the Declaration of Independence would inspire generations of Americans of all races and creeds to fulfill the promise of fundamental human equality and liberty, the most radical idea of the 18th century and today. And that's despite the fact that the document's primary author didn't live up to his words. Thomas Jefferson was a lifelong slaveholder. In this episode, historians Annette Gordon-Reed and Joseph Ellis discuss the power of the promissory note signed by the founders. They also consider the pitfalls of approaching the American past through the personal failings of men like Jefferson.