In the field of global security studies, inclusion, both in terms of process and outcomes, is certainly having a moment. Like many terms widely adopted by the international security and development communities, the utility of the discourse around inclusion stems in part from its ambiguity. The various contributions to this special issue make good and productive use of this ambiguity and have moved the discussion of inclusive approaches to governance, violence reduction, and peace-building forward. In doing so, however, they have put forth very different conceptualizations and operationalizations of inclusion and exclusion. Thus, my contribution to this symposium identifies these various conceptualizations, discusses the strengths and weaknesses of proposed measures, and concludes with remarks on the normative implications of these analyses.