4 ideas
In Potu, where women hold public office on equal terms with men, the Bergen student Niels Klim, rising in favour, submits a proposal that women be excluded from office. The outsider who assumes his own customs are natural is the one exposed as irrational by a society that actually works.
In Potu, a citizen who proposes a new law must present it with a rope around his neck. If the council rejects it as harmful, he is hanged on the spot. Putting a lethal personal cost on reform keeps the law stable and filters out careless innovation, so only proposals the author would stake his life on reach deliberation.
The slow, deliberate Potuans judge Klim's quick grasp of things a defect of shallow judgment and nickname him Skabba, meaning hasty. Traits are not good or bad in themselves, and a society's verdict on a person shows its own tempo and values as much as his character.
Power makes him suspicious and despotic, a revolt topples him, and he flees into a cave that returns him to the surface near Bergen. Imported technological superiority buys rapid dominion but not legitimacy, and the ruler it creates becomes the very European tyrant the book mocks.