In this volume, Klaus Holzkamp and his colleagues provide a coherent and broadly elaborated description of Critical Psychology--a theory of the evolution of the social constitution of human consciousness and forms of mental activity--which has been in development in Germany for more than twenty years and constitutes a radical critique and reconstruction of scientific psychology from a dialectical and historical- materialistic point of view. Its aim is to provide a firmer foundation than presently exists for a psychology that is methodologically sound, practically relevant, and theoretically...