Solidarity is an ‘unthought’ in the fields of organizational theory and management sciences. However, it is an increasingly important feature in the management of organizations. The contemporary world suffers from a double unsustainability: the abusive exploitation of natural resources endangers the balance of the climate and biodiversity, while growing inequalities condemn our ability to maintain a balanced society. These unsustainabilities are mutually reinforcing and call for the affirmation of a double solidarity, which unites humans among themselves, and links humans and nonhumans. Such an effort cannot be decreed. It must be organized.<p>Based on numerous grassroots initiatives and citizens’ experimentations that are being invented every day around the world and on a historical and anthropological approach, this book explores different ways of combining solidarity and organization. Solidarity-based management, governance of the commons, and Buen Vivir approaches are some of the perspectives analyzed in the context of a North-South dialogue in order to formulate the conceptual framework and practical steps of a social and environmental transition. It offers both theoretical background and living examples to students, professors and researchers to better understand and better teach new avenues for management.</p>