Offers a history of the role of investigations in radical political struggles from the nineteenth century forward.Militant Acts presents a broad history of the concept and practice of investigations in radical political struggles from the nineteenth century to the present. Radicals launched investigations into the conditions and struggles of the oppressed and exploited to stimulate their political mobilization and organization. These investigations assumed a variety of methodological forms in a wide range of geographical and institutional contexts, and they also drew support from the participation of intellectuals such as Marx, Lenin, Mao, Dunayevskaya, Foucault, and Badiou. Marcelo Hoffman analyzes newspapers, pamphlets, reports, and other source materials, which reveal the diverse histories, underappreciated difficulties, and theoretical import of investigations in radical political struggles. In so doing, he challenges readers to rethink the supposed failure of these investigations and concludes that the value of investigations in radical political struggles ultimately resides in the possibility of producing a new political “we.”Marcelo Hoffman is an independent scholar who received his PhD in international studies from the University of Denver and the author of Foucault and Power: The Influence of Political Engagement on Theories of Power. He recently served as a Visiting Specialist Professor at the Institute of Philosophy and Human Sciences of the State University of Campinas in Brazil.