They said it could not be done. There was no way, claimed an army of experts, columnists and opinion-formers, that a new withdrawal deal could be worked out between the United Kingdom and the rest of the European Union. It was quite impossible to solve the complex problems of Ireland's division, with the republic in the south staying in the EU and the north staying as part of the U.K.

Well, they were all wrong. A new deal was worked out, as I predicted on Sept. 20, paving the way for both orderly British withdrawal and new trade agreements with the U.K.'s other world partners, such as Japan, China and America, as well as a new type of relationship with the rest of Europe.

In the jargon, this was "a soft Brexit." The EU leaders and officials in Brussels agreed to it, the Irish government in Dublin agreed to it, business groups in Northern Ireland agreed to it and even the argumentative House of Commons at Westminster gave it majority approval. All was set for formal U.K. departure on Oct. 31.