diminished place in the world, to grant colonial freedom, to spend more on public services and to promote the right of individuals to live their own lives free from the constraints of popular prejudices and state interference. Jenkins later called it a "good radical programme, although...not a socialist one". In May 1960 Jenkins joined the Campaign for Democratic Socialism, a Gaitskellite pressure group designed to fight against left-wing domination of the Labour Party. In July 1960 Jenkins resigned from his frontbench role in order to be able to campaign freely for British membership of the Common Market. At the 1960 Labour Party conference in Scarborough, Jenkins advocated rewriting Clause IV of the party's constitution but he was booed. In November he wrote in The Spectator that "unless the Labour Party is determined to abdicate its role as a mass party and become nothing more than a narrow sectarian society, its paramount task is to represent the whole of the Leftward-thinking half of the country—and to offer the prospect of attracting enough marginal support to give that half some share of power". During 1960–62 his main campaign was British membership of the Common Market, where he became Labour's leading advocate of entry. When Harold Macmillan initiated the first British application to join the Common Market in 1961, Jenkins became deputy chairman of the all-party Common Market Campaign and then chairman of the Labour Common Market Committee. At the 1961 Labour Party conference Jenkins spoke in favour of Britain's entry. Since 1959 Jenkins had been working on a biography of the Liberal Prime Minister, H. H. Asquith. For Jenkins, Asquith ranked with Attlee as the embodiment of the moderate, liberal intelligence in politics that he most admired. Through Asquith's grandson, Mark Bonham Carter, Jenkins had access to Asquith's letters to his mistress, Venetia Stanley. Kenneth Rose, Michael Foot, Asa Briggs and John Grigg all favourably reviewed the book when it was published in October 1964. However, Violet Bonham Carter wrote a defence of her father in The Times against the few criticisms of Asquith in the book, and Robert Rhodes James wrote in The Spectator that "Asquith was surely a tougher, stronger, more acute man...than Mr. Jenkins would have us believe. The fascinating enigma of his complete decline is never really analysed, nor even understood. ... We required a Sutherland: but we have got an Annigoni". John Campbell claims that "for half