Boston College sociologist Charles Derber, a prolific author, activist, and social critics, says Donald Trump and the Right effectively combined grassroots energy and politics in a way the Left hasn’t done since the late 1960s. And, in his new book, he outlines how the Left needs to unify in order to regain ground and better fight for its core issues. In Welcome to the Revolution: Universalizing Resistance for Social Justice and Democracy in Perilous Times (Routledge, 2017), Derber says the Left has focused on identity politics to the exclusion of other groups. He writes: “The way to make a revolution is not to choose between class politics and identity politics, but to intertwine them so that identity politics advances economic justice for all and class politics advances the rights and self-worth of all identity groups.” In Welcome to the Revolution, Derber offers his vision, strategies, and tactics for successful, progressive unified politics. His book also features vignettes from more than 25 prominent activists, including Medea Benjamin, Noam Chomsky, Ralph Nader, Bill Fletcher, Juliet Schor, Gar Alperovitz, and Chuck Collins, among many others. More from BC News.