Epic slow burn fantasy that ruminates on trauma, the horrors of war and what it takes to overcome our propensity for treachery. Somehow Sanderson has managed to cram in: a pending climate apocalypse, a war started for vengeance but dragged out for financial gain and political expedience, a society segregated by sex and eye colour (what) with strict caste systems, an ancient esoteric conspiracy that makes Qanon seem reasonable and all the usual heroic tropes you'd expect as well. As long as you don't expect any quick answers and appreciate its deliberate pace, it rewards with lots of character development and juicy dilemmas to ponder and regular super powered action sequences. There's so much in here, and yet it also feels like the tip of the iceberg, a world we've barely begun to explore that might be ripped apart before we get the chance. Big millennial feels.