When the writer and painter John Berger won the Booker Prize in 1972—for his novel G., about sex, loneliness, a failed revolution, and the imminent devastation of the First World War—he rather famously donated half of his award money to the Black Panthers. On the political spectrum of his day, Berger’s action outraged the right and the left alike, the former for giving any cash at all to a band of militants, the latter for holding back the other half. A few months ago, the novelist and critic