1. Activity theory between historical engagement and future-making practice Annalisa Sannino, Harry Daniels and Kris Gutierrez; Part I. Units of Analysis: 2. Cultural-historical activity theory and organization studies Frank Blackler; 3. Uses of activity theory in written communication and research David R. Russell; 4. On the inclusion of emotions, identity, and ethico-moral dimensions of actions Wolff-Michael Roth; Part II. Mediation and Discourse: 5. Mediation as a means of changing collective activity Vladislav A. Lektorsky; 6. Digital technology and mediation: a challenge to activity theory Georg Rückriem; 7. Contextualizing social dilemmas in institutional practices: negotiating objects of activity in labour market organizations Åsa Mäkitalo and Roger Säljö; Part III. Expansive Learning and Development: 8. The concept of development in cultural-historical activity theory: vertical and horizontal Michael Cole and Natalia Gajdamashko; 9. Two theories of organizational knowledge and creation Jaakko Virkkunen; 10. Contradictions of high technology capitalism and the emergence of new forms of work Reijo Miettinen; 11. Spinozic re-considerations on the concept of activity: politico-affective process and discursive practice in the transitive learning Shuta Kagawa and Yuji Moro; Part IV. Subjectivity, Agency, and Community: 12. From the systemic to the relational: relational agency and activity theory Anne Edwards; 13. Expansive agency in multi-activity collaboration Katsuhiro Yamazumi; 14. The communicative construction of community: authority and organizing James R. Taylor; 15. Research leadership: productive research communities and the integration of research fellows Sten Ludvigsen and Turi Øwre Digernes; Part V. Interventions: 16. Who is acting in an activity system Ritva Engeström; 17. Past experiences and recent challenges in participatory design research Susanne Bødker; 18. Clinic of activity: the dialogue as instrument Yves Clot; 19. Epilogue: the future of activity theory Yrjö Engeström.