I wonder how much of this is driven by the publishers vs audiences. I have read a lot of blogs and articles from authors and agents about thematic checklists f

I wonder how much of this is driven by the publishers vs audiences. I have read a lot of blogs and articles from authors and agents about thematic checklists for publishing. On the flip side, immigration makes up the vast majority of content creation, and the leading edge were using these premises 20-30 years ago when they were more novel