In 1930s mysteries, all sorts of motives were credible which aren't credible today, especially motives of preventing guilty sexual secrets from coming out. Nowadays, people sell their guilty sexual secrets.
“The power and appeal of Documentary is the way it alters and plays with the way the viewer relates to and understands the subject.”
“They knew that Roosevelt and the Democratic party made a difference on them, on their quality of life issues, and they believed in that. But today it is completely different.”