We recently came across this tumblr post about different types of alternative history fiction, and it sparked a discussion about how we would tag it. All alternate history books would have alternate history as a genre tag, and the tags we discuss in this post would imply Alternate History.
Stories that start with a clear point of divergence that creates a self-contained alternate history/universe would be tagged with Historical Divergence. For example, the Black Plague killed 99% of Europeans, Charles Lindbergh won the 1940 US presidential election, or JFK survived the assassination attempt. The divergence can begin with a seemingly small change that has wide-reaching consequences, known as the Butterfly Effect.
Stories that generally follow actual history but include something fictional that changes the day-to-day or smaller events would be tagged with History, but Different. These are frequently sci-fi/fantasy novels. For example, there are ghost mediums in World War 2, zombies disrupted the US Civil War, or dragons were around during the Napoleonic Wars. More specific tags like History, but Zombies or History, but Dragons can be used, too.
The last type of alternate fiction described in the post was harder to tag. It’s when there’s a large, fundamental change in history but specific historical events still occur without real change. We’ve tentatively named it Ornamental Worldbuilding. We’re confident this exists, but we weren’t able to find any good examples of it. Have you read any alternate history fiction like this?
Overall, it was a fun post that led to a fun discussion. If you come across any more posts like those, we’d love to be tagged in them.
[Image ID: The words “Flavors of Alternate History. TagCat: a Tag Catalog. Tag Chat Thursday” over a background of five stacked, tan books.]













