This volume brings together Keynes’s attempts to influence the course of public opinion and public policy in Britain and elsewhere between the autumn of 1929 and Britain’s departure from the gold standard on 21 September 1931. At its centre are Keynes’s activities as a member of the Macmillan Committee on Finance and Industry (including the eight days of ‘private evidence’ he gave, setting out the theory of his then unpublished Treatise on Money and applying it to Britain’s contemporary problems) and the Economic Advisory Council and its committees. It also includes all his related journalism and his correspondence both with senior politicians and with other men of affairs. As such, it is a companion to the volumes dealing with the development of his more formal economic theory during these years, most notably A Treatise on Money.