Between the McCarthyism of the 1950s and the constant fear that Commies were under every rock and behind every door, tales of heroes and villains were being censored. Of course, it was all to 'protect the children,' a phrase we hear all the time today by right wing demagogues.
Here is a link to Ultra, the podcast by Rachel Maddow that goes more in-depth into McCarthyism.
https://podcasts.apple.com/us/podcast/rachel-maddow-presents-ultra/id1647910854
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