Basically, Brexit was a tantrum — what should we do about it?

The strangest thing about Brexit is that, of all the members of the European Union, Britain had the weakest case that it would be better off leaving.
Britain had managed to get itself a deal where it got only the good bits of the EU — free trade and an integrated market, and free movement of people within the union — while keeping its own currency and its own passport controls. The British relationship with Europe was a model for what a slimmed-down, good-parts-only EU should have co