Literature

I was thinking about this today. Where there stories in the past where the magic world and the normal world separate. The only Olden times stories i know of are myths and religious stories and i don't think those count since people already believed in the magic world, so no reason to say the everyday people where not aware of the magical world(except in cases like religion). I remember watching an OSP video(Trope Talk: Save The World). She talks about how The concept of the world or even a world being a modern day thing. People use to live in secluded areas from one another and so had no knowledge of a world, Most stories back than involved saving villages or towns or even islands. In Modern Marvel, all kinds of Magical worlds exist and normal people know of them and still go on about there day(Granted Most of those magical world revealed themselves to in modern time as not fuck up history). That's the only case of i know where both the magical world and the normal world exist side by side with everyday people knowing about them.What are your thoughts?