From the beginning of his career Alain Touraine tried to develop a heterodox sociological terminology which promised to open up new ways of thinking about the dynamics of modern societies. This article tries to bring to light some of the Sartrean roots of Touraine's early theoretical tools and to reconstruct his intellectual development through the 1970s and 1980s when he formulated his ideas on the emergence of social movements within post-industrial society. It will be argued that Touraine's major works of (...) the 1990s - though not without some theoretical problems - offer fresh insights into the conditions of modernity and are able to correct and modify interpretations of modernity of major theorists such as Habermas and Taylor. (shrink)