Adolfo Gilly (b. 1928) is most widely known for his classic study La revolución interrumpida (in English, The Mexican Revolution), which has gone through thirty reprints in Spanish since it first appeared in 1971. Gilly has been for many years a professor of History and Politics at the Universidad Nacional Autónoma de México, but as he explains in this interview, the book took shape far from academic settings, in the life of a revolutionary militant whose commitments took him all the way across Latin America and to Europe, into clandestinity, exile and the Mexican jail where his book was conceived and written. Today, Gilly combines university teaching and research with his older vocation of political journalist, writing in solidarity with popular movements in Mexico and elsewhere in Latin America. He gave this interview in 2009–10.