What caused similiar myths around the world?

I'm sorry if this is the wrong sub, but I realized that a lot of different cultures have similar stories, e.g there's a folktale about vampires in china, arab mythology has similar stories to European mythology (I don't know if mythology is the right word here), As I'm writing this I'm assuming that they must have come in contact in one or another, or are these just a part of human evolution?

Submitted October 22, 2019 at 07:29AM by YazanHalasa
via reddit https://www.reddit.com/r/AskHistorians/comments/dlh7za/what_caused_similiar_myths_around_the_world/?utm_source=ifttt