Jeffrey Shantz teaches human rights and community advocacy at Kwantlen Polytechnic University in Vancouver, Canada. A rank and file union and antipoverty organizer and scholar, he focuses on worker self-activity and the connections between ecology and labor organizing. He is the author and editor of eleven books, including Organizing Anarchy: Direct Action and Insurgency (Berghahn Books, 2012) and Green Syndicalism (Syracuse University Press, 2012).José Brendan Macdonald is Professor Emeritus at the Universidade Federal da Paraiba, Joao Pessoa, Brazil, where he founded the Incubator of Solidarity Enterprises. He has written extensively on solidarity economics.