content: Ethnicity predates nations and can be easily defined by scientific method (dna) and unique cultural expressions (anthropology). Just because some tribe thousands of years ago did not call itself "German" or whatever it does not mean that "German" as an ethnicity/nationality is artificial construct like USA. Nationalism is a conscious extension of this intrinsic separation of people into the realm of civilization and law. The forms of ethnic expression change and are not static, so there can be some absorption of neighboring tribes to a bigger singular body like "Germany", but its only possible if these tribes in the first place already are basically identical biologically, only having minuscule variations at most. So the only way to destroy ethnicity and nationalism is total miscegenation.