From time to time, a would-be edgy Tweeter or columnist will shock us all by stating or suggesting that the boring white people who until the last third of the twentieth century made up almost the entire population of the United Kingdom, have no real culture to speak of. There is a twofold implication to this rhetorical ploy: that indigenous Britons should fall on their knees in eternal gratitude for the hitherto unknown liveliness and dynamism of the various diaspora communities who have made their homes here, and also that the demand that newcomers integrate into our way of life...