Post History
Well first I would question giving readers information that no character knows. This creates dramatic irony, and while it has its uses is very frustrating to the reader who instead of feeling like ...
Answer
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/33283 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
Well first I would question giving readers information that no character knows. This creates dramatic irony, and while it has its uses is very frustrating to the reader who instead of feeling like he figured something out just sits there and waits for characters to discover what they already know. This seems like a setup for a Greek tragedy. What this really feels like is a worldbuilding question. You want to convey a part of your worldbuilding, but not through regular dialog. There are a few ways this is traditionally done. **A showing prologue.** This would be an introductory of a few pages to a story. These would be in a different tone than the rest of the work. In these pages the reader would quickly be caught up on the history. This approach is frowned on a lot in modern literature. **A cut to other characters.** Does anyone know? Maybe you could cut to some scholars sitting in a library discussing the intelligent species of the world. Game of Thrones does this in the beginning and end of every book. **Scripture or prophesy.** At some point have some ancient documents read into the narrative. It may not say the facts that you need clearly, but it does it in some way. The _Wheel of Time_ series mentions the _Prophesy of the Dragon_ every now and then. **A narrator that's a character.** If the narrator has a real personality they can then explain things. The _Hitchhiker's Guide to the Galaxy_ does this. The narrator is a whimsical fella and he tells jokes and sometimes explains this. This to me works poorly in anything meant to be serious. Otherwise... just include it in dialog.