I just thought of this this morning, and I've been thinking about it all day.

So, today and in the recent past the most common (or I guess the most well known or popular) delusions people with paranoid schizophrenia, or just paranoia, have are usually about technology, cameras, aliens, the government, etc.

Before technology and other similar things, what did delusions consist of? Basically, what were people paranoid about in the past? How did they change over time?

I'm not saying that all paranoid people have the same delusions or anything, I'm just curious to see what used to be common like delusions about technology are common today.

Thank you!