Mate, live expectancy went up because of general improvements due to better tech. Everywhere, just a little sooner or later depending on how quick they went from the classic farmers to more modern agriculture, medicine etc.

My fanfiction is what happened and happens all over the world. Why do you think the Japanese thought they are so much better and committed atrocities? Because of their genes? What about the Nazis? What about the Americans genociding Indians? Australians the aboriginals? Etc. etc. all over the world throughout history.

How am I "more propagandized" when I point out that these things exist? Explain.