The Enlightenment and the Curmudgeonly Thomas

CNN.com's John Sutter talks about the idea of "enlightenment" in an episode that airs tonight at 9 p.m. ET. He says he first learned about it in a fourth or fifth grade history class, but didn't realize how important it was until college. The author has been teaching business ethics and his PhD research is on modern thinkers such as Kant.