The (de)evolution of the Hero.
One of the things that I have found interesting is how society's view of what makes for leading man/hero material has changed over the decades, and 'Dracula' is a good example of that. Or more to the point, the role of Van Helsing.
In 1931 it was perfectly acceptable to have the lead protagonist in a movie be an old man who doesn't actually do much in way of physical activity. Contrast that with the version of the role in the movie named after the character in 2004. He becomes a young action star kicking keysters and taking names.
When did our society change in regards to what makes a good hero? Not only that, but why the change?
'Dracula', 'King Solomon's Mines', 'Fu Manchu', all these and more were products of the Victorian/Edwardian era, and all had main heroes who were, shall we say, 'long in the tooth'. When did ageism set in for Western Civilization?