Protevi (Louisiana State Univ.) continues his boundary-crossing work on how to understand the composite that is affective experience. Inspired principally by Gilles Deleuze, Protevi engages with the most interesting advances in neuroscience, complexity theory, and population studies in order to render more meaningful those affective, singular moments that act on us and through us to demand normative accounting and political action. Love, rage, and fear work alongside, below, and above the level of the subject and subjectivity. Standing against a naive essentialism and a naive social constructivism, Protevi develops a new architecture of labile, hybrid concepts (e.g., "body politic, "cognitive affect," and "emergent systems") that answer to the event-assemblages that are the body, subjectivity, and human relations. The first two chapters deliver the conceptual tools; the next two provide their genealogy in Aristotle, Kant, and Deleuze; and the last three provide timely and illuminating case studies (i.e., Terri Schiavo, Columbine High School, and Hurricane Katrina). This fascinating book is lucidly written, given its rich ambition, and will be of great interest to graduate students and faculty who wish to reengage that question most central to political philosophy: human nature itself.