John Porter Lecture: Waves of Protest—Direct Action, Deliberation, and Diffusion LESLEY WOOD York University The book Direct Action, Deliberation and Diffusion: Collective Action After the WTO Protests in Seattle argues that the process of diffusion is dependent on social processes in the receiving context. The most important in social movements is an egalitarian and reflexive deliberation among diverse actors. The book traces the direct action tactics associated with the Seattle protests against the World Trade Organization in 1999 and how these spread to activists in Toronto and New York City. It shows how the structure of the political field, racial and class inequalities, identity boundaries, and organizational and conversational dynamics limited deliberation among activists, and thus limited the diffusion of the Seattle tactics. By constraining the spread of the Seattle tactics, this slowed the global justice movement’s wave of protest. In this paper, I explore the application of and implications of this model of protest tactic diffusion to the recent Idle No More mobilizations. Le livre Direct Action, Deliberation and Diffusion: Collective Action After the WTO Protests in Seattle fait valoir que le processus de diffusion d´ epend de processus sociaux dans le contexte de r´ eception. Le plus important pour les movements sociaux est une d´ elib´ eration ´ egalitaire et r´ eflexive entre divers acteurs. Le livre retrace les tactiques d’action directe associ´ es aux manifestations de Seattle contre l’Organisation Mondiale du Commerce en 1999 et comment ils se propagent ` a des militants de Toronto et de New York. Il montre comment la d´ elib´ eration de la structure des in´ egalit´ es le domaine politique, raciales et de classe, les limites de l’identit´ e et de la dynamique de l’organisation et de la conversation limit´ ee parmi les militants, et donc limiter la diffusion de la tactique de Seattle. En limitant la propagation de la tactique de Seattle, ce ralentissement de la vague de protestation du mouvement altermondialiste. Dans cet article, j’explore l’application et implications de ce mod` ele de diffusion protestation de tactique pour les derni` eres Idle No More mobilisations. Lesley Wood, Department of Sociology, York University, 4700 Keele Street, Toronto, ON, Canada M3J 1P3. E-mail: ljwood@yorku.ca C  2015 Canadian Sociological Association/La Soci´ et´ e canadienne de sociologie