From Warsaw to Washington, the political divide that matters is less and less between left and right, and more and more between open and closed. Debates between tax-cutting conservatives and free-spending social democrats have not gone away. But issues that cross traditional party lines have grown more potent. Welcome immigrants or keep them out? Open up to foreign trade or protect domestic industries? Embrace cultural change, or resist it?

In 2005 Stephan Shakespeare, the British head of YouGov, a pollster, observed:

We are either “drawbridge up” or “drawbridge down”. Are you someone who feels your life is being encroached upon by criminals, gypsies, spongers, asylum-seekers, Brussels bureaucrats? Do you think the bad things will all go away if we lock the doors? Or do you think it’s a big beautiful world out there, full of good people, if only we could all open our arms and embrace each other?

https://www.economist.com/briefing/2016/07/30/drawbridges-up