FRASER NELSON: A Very British Revolution.

The world is looking at Britain and asking: What on Earth just happened? Those who run Britain are asking the same question.

Never has there been a greater coalition of the establishment than that assembled by Prime Minister David Cameron for his referendum campaign to keep the U.K. in the European Union. There was almost every Westminster party leader, most of their troops and almost every trade union and employers’ federation. There were retired spy chiefs, historians, football clubs, national treasures like Stephen Hawking and divinities like Keira Knightley. And some global glamour too: President Barack Obama flew to London to do his bit, and Goldman Sachs opened its checkbook.

And none of it worked. The opinion polls barely moved over the course of the campaign, and 52% of Britons voted to leave the EU. That slender majority was probably the biggest slap in the face ever delivered to the British establishment in the history of universal suffrage. . . .

The Brexit campaign started as a cry for liberty, perhaps articulated most clearly by Michael Gove, the British justice secretary (and, on this issue, the most prominent dissenter in Mr. Cameron’s cabinet). Mr. Gove offered practical examples of the problems of EU membership. As a minister, he said, he deals constantly with edicts and regulations framed at the European level—rules that he doesn’t want and can’t change. These were rules that no one in Britain asked for, rules promulgated by officials whose names Brits don’t know, people whom they never elected and cannot remove from office. Yet they become the law of the land. Much of what we think of as British democracy, Mr. Gove argued, is now no such thing.

Instead of grumbling about the things we can’t change, Mr. Gove said, it was time to follow “the Americans who declared their independence and never looked back” and “become an exemplar of what an inclusive, open and innovative democracy can achieve.” Many of the Brexiteers think that Britain voted this week to follow a template set in 1776 on the other side of the Atlantic.

We need more of this spirit, on both sides of the Atlantic.