States need walls?... Never mind that, if there is war, there is conquest.

All interesting things were thought in city states in ancient Greece...

And then the city-sates kept attempting conquering each other until all were conquered by Rome. And before that, they spawned a short-lived emperor who reached as far as India.

Meanwhile, students of Chinese history will swear that all interesting thoughts arose there, in what were de-facto nation states and then a single empire.

_{*Lunatic*, n.
One whose delusions are out of fashion.}