Harold Macmillan was a figure of paradox. Outwardly, it was Edwardian elegance and civilised urbanity. Inwardly, it was emotional damage from his wife's open adultery and his progressive perplexity at the onward march of time. The First World War showed the courageous soldier. From then on, it was politics, rather than the family business of publishing, which was to be his future. Nevertheless, although he supported Churchill in the 1930s he was deemed...