Balance of power and the puzzle of underbalancing behavior -- Prudence in managing changes in the balance of power -- A theory of underbalancing : a neoclassical realist explanation -- Great-power case studies : interwar France and Britain, and France, 1877-1913 -- Small-power case studies : Paraguay, Argentina, Brazil, and the War of the Triple Alliance, 1864-1870 -- Why are states so timid? State coherence and expansion in the age of mass politics.