The Decline of Politics: The Conservatives and the Party System 1901-1920 by John English (University of Toronto Press, London: Canadabooks International, 1977, pp 237, $15.00) Violence and Politics in Jamaica, 1960-70: Internal Security in a Developing Country by Terry Lacey (Manchester University Press, 1977, pp 184, £8.50) Sri Lanka: A Survey edited by K. M. de Silva. (London, Hurst, 1977, pp 496, £12.00)