Sustainability or Collapse? is the report of the 2005 Dahlem Workshop, which launched the multi-year project IHOPE (Integrated History and Future of People on Earth). A thorough appreciation of the inherent limits of contemporary models and methodological strategies would require greater attention to such critical issues as the policy implications of deep scientific unpredictability; critical thresholds and uncertainties in the global transition; and the roles of human values, culture, agency, and political mobilization. Nevertheless, by formulating bold, on-point questions, even if grand answers may prove elusive, this book stands as a significant way station on the long journey to an adequate science and practice of global change.

Originally published in Ecological Economics 68 (2009): 1900-1901.