The purpose of this article is to describe the origins of Possibilist Economics through a brief biographical account of the development of the ideas of Albert Otto Hirschman, the economist who was the founding father of this new branch of economics. The reader is also offered a description of the historical context in which Hirschman worked and developed his ideas. Objective: Describe how Possibilist Economics came about and what the method of Possibilist Economics is. Methods: The main method used for the development of this research is both deductive and inductive, i.e. a use of both classical research tools. The line followed is that of analysis made through the biographical path and historical context in which the economist of Possibilism. The research is based both on the analyses and study of the numerous books and articles written by A.O. Hirschman and on the direct experience of research and work that the authors of this article have carried out with Hirschman himself and with Luca Meldolesi (Italian economist and historian), the latter considered to be Hirschman's greatest collaborator and divulger in the world. Results and their significance: The research is an introduction to the fundamentals of the possibilist economics model