1E had monks because karate and ninja stuff was a big craze in the U.S. in the 1970s. It had spaceships and laser guns because some people thought it was fun. It has orcs and halflings and rangers because of Tolkien and dinosaurs because of Jules Verne and Arthur Conan Doyle and vampires because of Dracula and mind flayers because of Lovecraft and Greek gods and monsters because of Bullfinch’s Mythology. The idea that the game originally cared much about genres or elements being “right” for a particular real-world earth time period is silly. If anything, it started out much zanier than it now is, got more rigid, and is now opening up again but is still arguably less eclectic and unapologetically weird than 1E was.