The conclusions close the manuscript and make four points. First, they review the macro-level observational expectations tested in Part II, and how my findings, obtained through a triangulation of different techniques, allow for a comprehensive picture of how war affected state formation throughout the entire region. Second, they bring together all case studies in Part III, noting how the historical evidence collected fits the expectations of the theory at a micro-level—e.g., considering the behavior of individual actors and the effects of narrow events like battles within wars—and does so with out-and-out consistency—i.e., case by case, almost without exception. Third, they reflect upon the scope of the theory, discussing many other cases that could be explained by the long-term effects of war outcomes. This discussion covers many regions and time periods, showing that classical bellicist theory not only can travel, but can also solves logical problems and empirical puzzles highlighted by previous scholarship. Finally, the conclusions suggest many lines of enquiry for future research that the book leaves open.

In this chapter I lay the foundations of the book and give an overview of the argument. After introducing the importance of studying state capacity and the main puzzle of why certain states are set in divergent state building trajectories, I discuss the state of bellicist theory and criticisms related to its alleged functionalist approach to history, and lack of fit with a world where inter-state war has become less frequent. I then turn to Latin America, a poster child of anti-bellicist scholars. There I review the aforementioned books by Centeno, Kurtz, Mahoney, Mazzuca, Saylor, and Soifer, amongst others. My book is set against this new consensus which dismisses war as an explanation for intra-regional variation in state capacity. In a final section, I propose the need to rethink the theory with a focus on the long-term consequences of war outcomes rather than pre-war conditions. The introduction closes with a discussion of my case selection strategy and chapter layout.