Dalton Trumbo was a Hollywood screenwriter who refused to answer questions before a congressional committee “investigating” un-American activities. Along with 10 other writers he was put on a blacklist and, like thousands of others, treated as a traitor, a communist and un-American.

Before seeing the movie I hadn’t heard of Trumbo, but I know a bit about the anti-communist hysteria that existed in many countries during the Cold War.

Misguided people who marginalise and build fear against minorities have existed over many millennia.

It’s a great story told as a movie, and there’s important reminders in it for leaders, especially now.