Britain is in a state of collective depression. This is not unusual in the Western world. I write this from Prague, where many people say there is a mood of unrelenting glumness among Czechs despite the country’s successful transformation from an impoverished communist dictatorship 35 years ago to a prosperous democracy today. The sense that many economic and societal problems are getting worse, and that progress in addressing others is not happening, is pervasive not just in the UK and Czechia. The current US president talked of ‘American carnage’ during his first inauguration speech, and the French have been losing…