If you think about the world around us and how it came to be the way it is, most things you’ll look at are the result of a process. Villages were created out of a need for shelter and then grew into towns and some eventually grew into cities, while natural formations like mountain ranges rise and fall due to the workings of plate tectonics. When we set out to create a world for an RPG, or even for videogames and fiction, we are attempting to create a world that is the result of a process that has never actually happened. Some worlds can certainly have mountains that don’t line up along a range and aren’t even created by plates of earth shifting and colliding, but my personal belief is that if you are creating a world the best foundation you can use is that of the real world that we see all around us.