1. W. Bagehot, The English Constitution (London: Chapman & Hall, 1867).
2. See, for example, D. Hibbs, op. cit.; D. Snyder and C. Tilly, ‘Hardship and Collective Violence in France 1830–1960’, American Sociological Review, vol. 37 (1972) pp. 520–32;
3. R. Rummel, ‘Dimensions of Conflict Behaviour within and between Nations’, General Systems Yearbook, vol. 8 (1963) pp. 1–50.
4. See, for example, S. P. Huntington, Political Order in Changing Societies (New Haven, Conn.: Yale University Press, 1968);
5. L. M. Terrell, ‘Societal Stress, Political Instability and Levels of Military Effort’, Journal of Conflict Resolution, vol. 15 (1971) pp. 329–46;