alt Hacker NewsI am not convinced that the idea is recent, or rather, related ideas are not recent, going back thousands of years. It can be extremely complex, to put it very mildly. How well people that put their trust in some of those ideas fare, can likewise be an extremely complex topic, and can also be political. In some cases in some ways some of them might have fared well, in some other cases in some ways, maybe less so.
A group of men crossing the border into another country was (usually) automatically considered invaders if its size exceeded a certain number.
Eg Iberian Peninsula (Reconquista and later): Foreign parties >10 armed men could not cross without permission between christians and muslims.
Chinese frontier zones, Scythians, Huns, Mongols, Turks etc all had similar rules. If you want to go back further, then Assyria, Egypt, Hittites, Greece had such limits.