premise: Harold Macmillan was a senator.
hypothesis: Maurice Harold Macmillan , 1st Earl of Stockton , ( 10 February 1894 -- 29 December 1986 ) was a British Conservative politician and statesman who served as the Prime Minister of the United Kingdom from 10 January 1957 to 19 October 1963 . After the war Macmillan joined his family business , then entered Parliament in the 1924 General Election , for the northern industrial constituency of Stockton-on-Tees . Macmillan was the last British prime minister born in the reign of Queen Victoria , the last to have served in the First World War , the last to wear a moustache when in office , and the last to receive an hereditary peerage . The Middle Way is a book on political philosophy written by Harold Macmillan ( British Conservative Party politician and later prime minister of the United Kingdom ) .