history is WRITTEN by the winners and is written to tell a story, and what isn’t written is pretty hard to talk much about. So whilst the Norman conquest is well known, not so much is written about the Danelaw. You hear about King John being a shit, and Richard being good, but you don’t get much on the real story about being french and spending the entire reign in the holy lands. Was Richard really an evil hunchback or did it suit the Tudors justifying their position. Why is so little known about Matilda, maybe the idea of a Women in that position at that time was an issue?
If you look at the population of the UK through ALL history maybe a few hundred people are actually known about in any depth. How can you teach people about what is not recorded in any depth.
Another case take the Illiad, Kleos, heroic death, it is about actions that are remembered.
However through time many actions are of great importance but they are hard to pin to a time or a place, and so are easily forgotten, or they don’t fit the narrative that those writing the histories deemed important. Imagine a world without Steel, but name the person who first created it.
Read up on the Mongol destruction of eastern europe and how the two sides tell VERY different stories.
You learn about what is known and what suits,