The BBC has announced plans to invest £100 million pounds in ‘diversity’ for its television output. Bravo. I’m a great believer in diversity. A thriving, vibrant democracy needs as much diversity as possible in public discourse – a plurality of voices, of outlook and of background.

But I suspect that the BBC is thinking of ‘diversity’ in only the narrow, fashionable sense of today – in gender, race and sexuality, but little else.