In the Second World War years, the long-dreamed-of idea of a politically united Europe finally began to be realized, if only in Western Europe. At the heart of this project for a united Europe was the principle of “unity in diversity,” with the diversity lying in the distinct national cultures across Europe. Chapter 8 focuses first on the various reflections on the idea of a “European spirit” discussed at major international conference in Geneva in 1947, before considering the ways in which the notion of “unity in diversity” served to provide an ideological underpinning for this new Europe. Among the many writers and thinkers discussed in this chapter are T. S. Eliot, Denis de Rougemont, Georg Lukács, Stephen Spender, Georges Bernanos, and Karl Jaspers. The chapter highlights just how challenging it is to break with Eurocentric, Euro-supremacist, and Euro-universalist agendas even when the emphasis is placed on diversity. The case of Oswald Mosley, the leader of the British Fascists in the interwar years, is particularly instructive. As this chapter shows, he was among the most ardent advocates of a united Europe, his arguments having profound implications for any progressive idea of Europe.