The History Manifesto and Sweeping Histories

If History is the science of Science of Science Fiction — who said that? — then History is the bedrock of Fantasy.
In High Fantasy the characters make new history by engaging with the old; Frodo disposes of the ring and secures Middle Earth’s future, but the Ring Wraiths are ancient kings and the politics is grounded in the past. In Low Fantasy — what we mostly call Sword and Sorcery — the characters forage like ants in the debris of history; Conan loots ancient tombs, and loses his sweetheart to an antique monster.
In between, the heroes of Heroic Fantasy delve in the past in order to remake the present; the heroes in Michael J. Sullivan’s Riyria Chronicles actually resolve the geopolitical plot with an extended stint of dungeoneering.
And if Science Fiction is about future history, then it’s also often about future ancient history. We love our alien artefacts and lost forerunner civilisations. What is Aliens if not a Dungeons and Dragons story, but with more face huggers?
So we readers of Speculative Fiction also have an appetite for history, not just the down in the dirt tales of derring-do with William Marshal or Harald Hardrada, or the Rifle Brigade, carving out their personal histories with blade or bullet, but longer thrilling stories of the rise and fall of civilisations, or the evolution of a particular strand of human experience, whether it be war or sexuallity, or gender, or commerce.
Oddly, as noted by a pair of top historians, not a lot of these books are written by card carrying academic historians anymore…