These past two weeks then have made two things clear. The first is that the US has decided to abandon the role in the world it assumed during the second world war. With Trump back in the White House, it has decided instead to become just another great power, indifferent to anything but its short-term interests, especially its material interests. This leaves the causes it upheld in limbo, including the rights of small countries and democracy itself. This also fits with what is happening inside the US, where the state created by the New Deal and the law-governed society created by the constitution are both in danger of destruction.

In response, Europe will either rise to the occasion or disintegrate. Europeans will need to create far stronger co-operation embedded in a robust framework of liberal and democratic norms. If they do not, they will be picked to pieces by the world’s great powers. They must start by saving Ukraine from Putin’s malevolence.