The Socio-Economic Approach to Management (SEAM) is a management methodology for developing the sustainable performance of organizations. It finds its roots in a socially responsible vision of capitalism and its originality is to offer a unique management model useful for sustainably managing people and providing socially responsible consulting, as well as for carrying out research-interventions and creating knowledge. This book is the first to present in a synthetic way and illustrate with case studies the political, managerial and scientific dimensions of SEAM. This methodology has been successfully tested on thousands of companies and organizations from 48 different countries since 1974 and distinguished by prestigious French and American academies. It aims to convert the hidden costs of social dissatisfaction (absenteeism, excessive staff turnover, underproductivity) into economic value for the organization, which can be used to increase salaries, self-financedinvestments, master budgets or remunerate shareholders. It will be of great interest to students and scholars of management, as well as practitioners and consultants.