With so many worldhoppers, how is it that knowledge of the Cosmere is so uncommon? Are worldhoppers sworn to secrecy about this?
Not most of them.
But not uncommon maybe?
No, I mean the Seventeenth Shard's not supposed to intervene, so there are some that are not supposed to. The majority of them, no. But at the same time, yes, the Horneaters know about them because that's where the perpendicularity is. How many people travel to the Horneater Peaks?
And yes, in most large cities on Roshar you will find a handful of worldhoppers. But what are you going to say? "Yeah, I'm from another planet!" and they're like, "What's a planet?" Yes, Jasnah and people, scholars would be able to be like, "Wow, this in mind-blowing!" Other people are like, "Oh, is that over the mountains? I've never been over there."
It's not this thing that is going to spread as much until—I think until there's mass communication and there is mass literacy and understanding. To place yourself in the context, you can say, "I'm from the stars," and they'll be like, "Yeah, so are we! We came from the Tranquilline Halls! You see all these Iriali over there? They came from another land as well." To them it's mystical. They don't put together this in the same way that I think that... I think that if you went back in time to medieval era and you said, "I'm from beyond the stars!" they'd be like, "Okay. That's as weird as being from over there on the spice route. I've never been to the next village, I can't conceptualize being from the stars". They'll either just think you're weird or that won't be as mindblowing as it would be to people once they have education and mass communication.
Which is why I think things during Era Two of Mistborn—that at that point things are spreading, people are understanding. It's starting to be a thing, and to them it is kind of mind-blowing. But to your average person in Bavland, they'd be like, "Okay. Sounds good. Where's my food?"
Who would believe you?
Yeah. Who would believe you, who who understands what you're saying would believe you, and who else would have the context to understand? I just don't think that it's as big a thing as you think and also I think that in the era before mass communication, the numbers of people that are worldhoppers, even if they are in the hundreds or even thousands, is so small compared to the size of a planet like Roshar in populations that it just is not going to spread in the way that you think it will.