I do wonder about that. There are worlds out there that are so similar to each other except for certain happenings, and others where they are incredibly different but share the same literature. For example, there is a romantic tragedy written in my world, by a William Shakespeare, that also exists in many different versions of the world called Earth. But there are scant other similarities.

...But here I am, talking too much about a subject we have little control over. My name is Albert Silverberg, and I am pleased to meet you.