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Hah! Objection! The Romans weren't "superior" to the Ancient Brits. It's merely that the Brits are often inaccessible to us. That's not their shortcomings, but ours in interpreting the material remains of a mainly prehistoric folk, usually through Roman-tinted spectacles.
On national identity, it changes - it's not fixed. Indeed, it's an historical creation, and besides, can only form in juxtaposition with those who claim another identity. I don't think it's necessarily a national identity that should concern us, but instead certain aspects of what might appear to be a national culture. An example - a useful thing to get rid would not be tolerance and acceptance (and not throwing the community baby out with PC-maligned bathwater), but anger and egocentrism; a little less "me" and a little more "we"
Local politics? If we're into well-known speeches, then how about "Ask not what Dover can do for you, ask what you can do for Dover." But that should apply across the board, not just in politics. It's certainly an underpinning philosophy in the DWMP.