I am always baffled by the overwhelming demand for a united Italian civ. I totally understand and personally want representation from the very important and influential Italian city-states, but I feel like Rome has always stood in for the idea of a united Italy/Italian empire and thus adding another version of it seems Eurocentric for Eurocentrism's sake. Like, there are important European empires that influenced major parts of world history, like Portugal or Austria, which (to me) deserve inclusion more than United Italy... I've yet to be sold on the idea, other than some great potential gameplay mechanics that I keep seeing be proposed.
I really don't understand how everyone thinks that legions and baths represent italy from the middle ages onwards, and yet accepts the byzantines which was still the Roman empire but later on.
History has contiguity and societies change gradually through time so honestly every civilization that occupies the same territory is going to have close relation with the civilizations that occupied that territory in the past.
However it is also agreeable that there is a distinction to be made, and there we have to agree on a common measurement to divide different civilizations, because the same story everyone uses for italy is applicable to a lot of other civs like mexico whose pop culture is directly influenced by aztec traditions, or spain and the arabs, and much more.
So our unit of measurement has to be the same: i believe that a civilization is defined by language, institutional structure, economic structure, composition of its society
If we consider Rome and Byzantium different civilizations as many historians do due to many differences in institutions, language, economic structure and societal differences than italy and rome should be considered very very different:
The italian language has lost almost completely the use of declinations which is the backbone of latin grammar, german instead still uses it. Also the italian language uses articles that latin didn't have and also a lot of words come from germanic due to the lombard reign in the early middle ages.
The italian institutional structure in the middle ages was much more germanic (dukedoms, kingdoms and counties) than latin ( roman repubblic) and even when there were republics on the peninsula they were never comparable to the roman one.
The economic structure of rome was based on agricultural slavery, the italian economy is mainly based on manifacturies and trade since the middle ages.
Roman society was very rigid and divided into plebs and patricians, the italian society was more varied and the new patricians (nobles, dukes eccetera) had a more marginal power related to the old patricians mainly due to the power of the italian bourgeoisie.
So there are extreme substantial differences between italy and Rome.
Case closed.