Hey Jerome, thanks for reading and responding thoroughly!
Rome's longevity certainly had a lot to do with how well it learned to integrate other peoples into its structure, even though it did so imperfectly and sometimes against its own parochial interests.
I've noticed the History of Byzantium, and I intend to start it soon. I've gotten into a bit of ERE history with a few videos about the start of the First Crusade, and I've since come to rate the Greeks highly on their political intrigue.
I should start it soon!