Despite the significant importance of the non-profit Sector, there is a relative limitation of possible modelling related to the management of the Non-Profit Institutions (NPIs). The studies and the research are concentrated in the analysis of the characteristics and the limitations related to the NPIs, rather than to the identification of possible models that can guarantee virtuous paths to these organizations. This book provides hypothetical trajectories for the construction of a theoretical model of reference for the management of NPIs—it accounts for the difficulties and the peculiarities of the non-profit sector, without however renouncing the concrete necessity and the great importance of approaches that try to avoid, or limit, the search for hybrid approaches constituted by the simple "transplant" of tools and techniques taken from the market or from the public administration context. Ultimately, it asserts that the non-profit sector is increasingly becoming the "pillar" on which modern civil society stands, to move towards a better future. The main aims of this book are to identify a link between accountability, responsibility and public trust in NPIs through a potential multidimensional managerial model in which these conceptual elements can be represented in a coordinated and systemic way. It will be of interest to researchers, academics, policymakers, and students in the fields of public and non-profit management, business management and administration, and public administration.