Interesting read. I not much of a film historian, and didn't know about the crackdown and censorship that took place after the the creation of that code. I'm glad it didn't last. Just watched Pulp Fiction for the first time in several years last Sunday evening. I think I liked it more than ever!
It was first introduced in 1930, but the studios just really didn't care about it. That was until 1934 when Catholics decided to boycott the theatres until it was enforced. It mainly stayed this way until the cultural shift of the 1960s. However, even if it wasn't enforced the 1940s and 1950s might have been more conservative anyway due to World War II and the Cold War making it less acceptable to criticize the country and its problems.
I like Pulp Fiction too, pretty good movie.