citizens are politicized. In addition, the vacuum created by the silence and inactivity of civil society has let in radical groups such as the ethnic/religion-based groups, Sri Lanka trade unions; and NGOs have taken lead roles as political pressure groups. See also List of rulers of Ceylon List of presidents of Sri Lanka List of prime ministers of Sri Lanka Sri Lanka leftist parties Notes References Sources Hickman, J. 1999. "Explaining the Two-Party System in Sri Lanka's National Assembly." Contemporary South Asia, Volume 8, Number 1 (March), pp. 29–40 (A detailed description of the effects of the bonus seat provision). James Jupp, Sri Lanka: Third World Democracy, London: Frank Cass and Company, Limited, 1978. Further reading Robert C. Oberst. "Federalism and Ethnic Conflict in Sri Lanka", Publius, Vol. 18, No. 3, The State of American Federalism, 1987 (Summer, 1988), pp. 175–193 External links Office of the Governor – Uva / ඌව පලාත් ආණ්ඩුකාරවර කාර්යාලය