Aside from that I'm not familiar with the genre and I'd like a timeline to see if it really fits that well with Reagan, there's something dramatic which has been happening more recently: the rise of the paranormal romance.
As far as I can tell Laurel Hamilton kicked off the genre, even though Anne Rice was a clear predecessor.
Survival fiction about the threat that must be fought. Paranormal romance isn't just about falling in love with vampires, werewolves, or whatever--it's generally about integrating human and alien/occult/monstrous societies.
I'm not sure where to do with this except to say that it's suddenly become quite a popular genre and if you can read the tea leaves about survival fiction, then there's another thing going on, too. 9/11 didn't slow paranormal romance down, and now that I think about it, it may have mostly been post 9/11.
On the other hand, I have no idea why pirates, zombies, and ninjas have suddenly become so popular. Are pirates and ninjas mostly a fannish thing? Is faerie waiting in the wings?
Diskworld and Mieville's (1998) are interesting non-romance examples of integration between human and fantasy creature societies. You may not have heard of King Rat--it's a combination of gross-out horror and carefully worked out life with monsters and as a semi-human monster who remains connected to both societies.