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Keon West could reel off anecdotes about the everyday racism he experiences – but he won’t. Personal accounts rarely convince anyone, he says, and, all too often, they are dismissed or put down to some other, less offensive, cause. Instead of the feelings that racist behaviour and accusations of racism provoke, he prefers to focus on facts.

A social psychologist at the University of London, West has consolidated hundreds of rigorous empirical studies on racism conducted over decades in his new book, . By exploring how experiments can detect racism and measure its impact across societies, he…