Friendship as “a tool for statecraft” as described in Winston Churchill’s biography of his famous ancestor John Churchill, the Duke of Marlborough is considered in the article “Political Friendship in Churchill’s Marlborough” by John von Heyking (University of Lethbridge) and published online in Perspectives on Political Science (January 10, 2017). The author writes that Marlborough is Churchill’s “greatest statement of his political wisdom and consists also of a sustained statement on the centrality of friendship in politics.” Also considered in the article is the method Churchill used in writing Marlborough of making extensive use of his subject’s correspondence in order to “make Marlborough speak whenever possible.” A method he used again in writing The Second World War. The web site for Perspectives on Political Science is here.