Agenda 21 calls for a directed, profound, comprehensive, and as rapid as possible transformation of the consumption habits of industry, government, commerce, and individuals. The validity of this objective is undisputed today. However, whether and how such a type of transformation can be realized is a subject of significant doubt, not least from a social science perspective. The book provides an overview of the current state of the discussion on the possibilities and limitations of directed change in three socially central fields of sustainability policy: consumption, businesses/organizations, and governance. Despite obvious difficulties, the overall assessment is cautiously positive.