http://www.youtube.com/watch?v=3nublLQDGbU

In there was a Hollywood blacklist that consisted of  a list of actors, writers, directors, musicians and other entertainers. Their political beliefs and associations, regardless of their validity, caused them to be targets. This blacklist was created around mid 20th century. In 1947, a group of screenwriters and directors were the first to be victims of this blacklist when they chose not to give their testimonies.They were banned from further working in the entertainment industry. It was not until 1960 that the blacklist was thrown away. Because they were banned, we missed out on a decade worth of entertainment. That is 10 years of movies, shows, or of the such that could’ve topped movie charts for centuries to come.