LONDON — The British have given the world’s political, financial and business establishment a massive kick in the teeth by voting to leave the European Union, a historic decision that will plunge Britain into uncertainty for years to come and reverses the integration on which the Continent’s stability has been based.

Warnings about the dire consequences of a British exit from President Barack Obama, Britain’s political leaders, major corporations based in Britain and the International Monetary Fund proved useless. If anything, they goaded a mood of defiant anger against those very elites.

This resentment has its roots in many things but may be summed up as a revolt against global capitalism. To heck with the experts and political correctness was the predominant mood in the end. A majority of Britons had no time for the politicians that brought the world a disastrous war in Iraq, the 2008 financial meltdown, European austerity, stagnant working-class wages, high immigration and tax havens for the super-rich.