Lord Kahn was a leading figure in the development of modern economic theory. Not only did he play a vital role in the conception of the new theories of employment and money in the inter-war period, but he also made important contributions to the further development of monetary theory and the theories of economic growth during the last half of the twentieth century. This selection of essays illustrates the broad range of Lord Kahn's achievement, from the path-breaking 'multiplier' article to a recent essay on the growth of corporate firms. It brings together both papers previously published in academic journals and papers published elsewhere, including his important evidence to the Radcliffe Committee and two radio talks on Lord Keynes.