Whether we ever get to know about them or not, there are very probably alien civilizations that are superhuman, to the point of being god-like in ways that exceed anything a theologian could possibly imagine. Their technical achievements would seem as supernatural to us as ours would seem to a Dark Age peasant transported to the twenty-first century. Imagine his response to a laptop computer, a mobile telephone, a hydrogen bomb or a jumbo jet.
I do not know if the doctrine that the nation-state arose in the 19th century was still being taught:;. . . but it is erroneous. The nation-state reaches back far into the origins of Europe itself and perhaps beyond. If Europe was not always a Europe of nations, it was always a Europe in which nations existed, and were taken for granted, as a basic form of the State.