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....