Panhellenism

[Ghostmojo]

Local identities may well have broken down - but it was not just because of the Pax Romana nor the passage of time. Greece was ravaged by invasion just as the rest of the empire - think Alaric - and some parts considerably depopulated. Breakaway groups headed for the highlands (think the Mani and their closed world) and of course there was a considerable incursion of slavic peoples who mingled with the extant Greeks, and the domination by the Ottomans for hundreds of years. All of this produced the population that exists nowadays.