I have thought that Sci-Fi / speculative fiction stories are in a really good position to be categorised by something similar to Aarne–Thompson–Uther index. Co

I have thought that Sci-Fi / speculative fiction stories are in a really good position to be categorised by something similar to Aarne–Thompson–Uther index. Consider some basic stories like: * a person travels backwards through time to prevent a tragedy. - By doing so they cause the tragedy to occur. - On returning to their own time they discover the tragedy was necessary for their society. * a person travels backwards in time to meet their hero. - they discover the person didn’t exist and become them. - they discover the person isn’t as heroic as they hoped and coach them. Just four examples, but I’m sure you can see how many stories fit into each.