Nationality does not mean citizenship. You are born into your nationality, you cannot change it. Your children can have a different nationality depending on who you have them with.
Everything that is "nurture" always has it's roots based in biology, because once again the brain is a biological organ.
That's all well and good if you want to define it that way, but all those empires that defined nationality by citizenship still existed and disprove the claim that soft identity societies can't survive.
Nationality does not mean citizenship. You are born into your nationality, you cannot change it. Your children can have a different nationality depending on who you have them with.
Everything that is "nurture" always has it's roots based in biology, because once again the brain is a biological organ.
That's all well and good if you want to define it that way, but all those empires that defined nationality by citizenship still existed and disprove the claim that soft identity societies can't survive.
How's that British Empire looking?
Not quite as long lived as the Roman one, but about 10x more enduring than the last explicitly Aryan one.