It would be wrong to say that Boris Johnson has no foreign policy. He has at least one. It is a good one, too – supporting Ukraine against Russian aggression. What he lacks is a strategic concept of how Britain fits into the world and how it should maximise the advantages of that fit.
Brexit was supposed to be that concept and it has failed. The economic damage inflicted by withdrawal from the EU single market is only half of that failure. According to Eurosceptic ideology, the suffocating burden of Brussels bureaucracy condemned the whole of Europe to decline. The future belonged to “Global Britain”, sailing off into its sovereign future without a backward glance.