Michael Hardt and Antonio Negri are among the most powerful theorists of communication and social change under present-day global capitalism. In their Empire trilogy and other individual and collaborative works, Hardt and Negri argue for the fundamentally communicative nature of contemporary power. Their analyses demonstrate the ways that media technology, global flows of finance capital, and the contemporary shift to economies based on information and affective or emotional labor create new, more complex networks of oppression and new possibilities for more democratic social change. Hardt and Negri’s work, therefore, shifts the focus of critical communication and cultural theory from attaining or challenging political power within the nation-state and invites scholars to rethink sovereignty as empire: an interconnected global phenomenon appertaining to capitalism in the late 20th and early 21st centuries. They furthermore reimagine dissent as a constitutive process of resistance and mutual aid through which the multitude simultaneously withdraws from empire and composes itself through the social communication of struggles across time and space. Hardt and Negri’s work has been taken up in communication studies to theorize the materiality of communication; the labor performed in cognitive, communication, and service industries; contemporary media audiences and reception; and historical and contemporary social movements, from the Industrial Workers of the World to the Arab Spring and Occupy Wall Street.