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1. The Identification and Consequences of the Diffusion of War     1
2. The Context of Diffusion: Opportunity, Willingness, and Geography     21
3. The Diffusion of War across Space, 1816-1965     45
4. The Problem of Time in the Diffusion of War     73
5. Explicating Opportunity, Willingness, and the Diffusion of War     91

Appendix     103
Bibliography     127
Index     137


A study of wars and what causes them to expand