Hi! I’m just trying to wrap my head around this. Am I right when I say that the citizens’ beliefs in certain things (ghosts, fairies, aliens) affects whether the nations can see them?

 Absolutely! Here’s a small source guide I’ve compiled for this: 

Fantasy England [x] – Explains
why England can see magical creatures/ ghosts.

America’s Situation with Ghosts [x] – Explains why America can’t see ghosts.

Merry Halloween [x] – Explains
why America can only see ghosts/ magical creatures on Halloween.

World ☆Stars Chapter 23 [x] – Explains
why America can see aliens (Tony).