The previous 10-15 years has seen a large and unprecedented increase in the number and percentage of movies and TV shows made in USA which are centered around one or more superheroes. In fact, it is now possible to find critiques of this endless glut of superhero-based movies in allegedly "respectable" magazines as well as on clickbaity sites. In other words, the idea that too many superhero movies are being made is now a mainstream viewpoint. But how did we end up here? More importantly, why? While movies centered around superheros have been around since the dawn of cinema, the actual number of superhero movies released per year was rather small until the 1970s. The first significant increase in number of superhero movies came in the late-1970s and early-1980s. But even then, it was unusual to see more than 2-3 of them per year.