The EU referendum campaign, as rough and ugly as it has sometimes been, is the best thing to have happened to British politics in a generation.

Sure, the debates have been lame, the fearmongering out of control, and if I get pestered by one more rosy-cheeked Remain campaigner outside my local Waitrose — they know their target audience, eh? — I might lose the plot.

But never mind all that. For this campaign has done a really good thing, a thing that political theorists have flat-out failed to do: it has revealed the real divide in 21st-century Britain.