Violence and Social Orders: A Conceptual Framework for Interpreting Recorded Human History (Cambridge 2009) offers a theory of the evolution of the modern state and an even more ambitious framework “for interpreting recorded human history.” The book raises fundamental questions about the political structuring of violence, the functions of the rule of law, and the establishment and maintenance of political order. In doing so, it speaks to a range of political scientists from a variety of methodological and subfield perspectives. We have thus invited four prominent political science scholars of violence and politics to comment on the book: Jack Snyder, Caroline Hartzell, Jean Bethke Elshtain, and Larry Diamond.