It's perhaps part of the confusion, and a sign that the states - rather than nations - have become so important that the concepts have been muddled, but I think

It's perhaps part of the confusion, and a sign that the states - rather than nations - have become so important that the concepts have been muddled, but I think that what you refer to as a "civic nation" is actually typically called a "state." "Ethnic countries" - if the states primarily contains one nation of people - ethnically (ie mainly culturally), is commonly referred to as a national state. National states became a popular concept in the 19th century, possibly because the kings, emperors and other rulers were starting to loose power and had to build their states around some concept. Before that, the kings and the rulers did not give the nationality of their subjects much of a thought I suppose.