Alien space bats (ASBs) is a neologism for plot devices used in alternate history to create a point of divergence that would otherwise be implausible. [edit]Definition

"Alien space bats" originally was used as a sarcastic attack on poorly written alternate histories due to lack of plausibility. These attacks are usually phrased as the need for alien space bats or by saying the alternate history has gone into "ASB territory". This original definition was used by one critic to criticize Harry Harrison's Stars and Stripes trilogy.[1] The term eventually evolved into a deus ex machina to create an impossible point of divergences.[2] Examples include changes to the physical laws of nature, introducing magic into the world, time travel, and advanced aliens interfering in human affairs. An example of aliens interfering in human affairs to change the direction of history is Harry Turtledove's Worldwar series.[3]

Q: I’ve heard there are only 7 (or 5, 20, 36…) basic plots (or themes) in all of literature. What are they?

A: People often say that there are only a certain number of basic plots in all of literature, and that any story is really just a variation on these plots. Depending on how detailed they want to make a "basic" plot, different writers have offered a variety of solutions. Here are some of the ones we’ve found:

1 Plot | 3 Plots | 7 Plots | 20 Plots | 36 Plots