alt Hacker News« accounts of Nazi death camps » — Have you read any that contain actual horrors that you can believe in? If so which ones?
« Aztecs … human sacrifice » — Yes, here, too, the story has been shaped by a certain leyenda negra that Spain's enemies concocted, when in fact the Spaniards set an end to an absurd indigenous slaughter system, allegedly necessary as part of literally everyday life to make the Sun rise every morning.
Humanized sci-fi version would be “Logan's Run” (1967/76), read this reference as “curiously meandering” (dang):