Charles Schulz's cartoon about a depressed kid seeking advice didn’t seem like a winner, but it gently voiced thought-provoking ideas.

Stephen Lind, an associate professor at USC's Marshall School of Business, who is a Schulz and "Peanuts" expert explains why the popular holiday television program endures after 60 years and goes beyond its obvious message.

Here is the charming original CBS promo for "A Charlie Brown Christmas" from 1965. There's a scene shown in which Charlie Brown tries to play Schroeder's piano and is punched clear out of frame by Lucy.