I know the rules here are such that we don't talk about voting up/down, but I have no idea why you were voted down. Your post is on-topic and informative. I didn't know their was a book version or the CEI movie version, I had only watched the Free to Choose series. Thanks for sharing.
Milton Friedman described the pencil in his Free to Choose series: https://www.youtube.com/watch?v=67tHtpac5ws
And in 2012 CEI made a movie version: https://www.youtube.com/watch?v=IYO3tOqDISE
I know the rules here are such that we don't talk about voting up/down, but I have no idea why you were voted down. Your post is on-topic and informative. I didn't know their was a book version or the CEI movie version, I had only watched the Free to Choose series. Thanks for sharing.