What is the appeal of Trump, really? It's nostalgic: "Make America great again." Like European nationalists, he has a vision of a "real" America, one which predates globalization, immigration, feminism, the civil rights movement and technological change, an imaginary 1950s to which we can now return. That is actually not very different from the kind of language that Marine Le Pen uses, or parts of the Brexit movement.

The world has always been a dangerous place. Now it is dangerous in a different way, because the world order that we've known since the end of the Cold War has been radically transformed. All of the institutions that preserved peace and promoted global trade will be weaker - NATO, the EU, NAFTA - and US relationships with other countries will change, too.

High national emotions are permissible when a soccer team is playing precisely because they are impermissible at most other times. There aren't, simply, many other places where you can sing your national anthem until you lose your voice without causing a riot. In the context of soccer, flag-waving nationalism - even chauvinistic, anti-foreigner, flag-waving nationalism - is acceptable in Britain.

We can't continue assuming that politics is something which is decided elsewhere by distant leaders in a distant capital. Protest is insufficient too. If people who are willing to put time into demonstrations also prove willing to work on behalf of candidates in local elections - or to become candidates themselves - they will achieve far more. If all of this upheaval provokes more involvement, then we have a slim chance of ending up with more vibrant democracies eventually. The alternative, as you've hinted, is that democracy fails altogether.

I don't want to predict calamity. But I am afraid of a new Russian occupation of parts of Eastern Europe. Also of a new Russian campaign to exert influence in Germany or other parts Europe, aimed at making continental politics less democratic. I am afraid of a US trade war and even a shooting war with China.

The surge in right-wing populism and the phenomenon of Trump are related. You can think of them together as the same problem.

Steve Bannon, the White House chief strategist, appears to imagine an alliance between Trump, Le Pen, Geert Wilders and Nigel Farage. Call it the populist international, a fraternal association of the nationalist right, binding people who want borders, across borders.