The Council Fathers, at the second session of the Second Vatican Council (1962-65), gave the Church a mandate to engage with the entire human family, with whom she is connected in conversation and dialogue about its various problems. They believed this gesture would bear “witness to the faith of the Church and [be] an eloquent witness and proof of her solidarity with and respect for the human race”. Since then, several initiatives of the Dicasteries of the Roman Curia have sought to implement the Council’s mandate. MENSURAM BONAM (MB), the work that is presented here, is part of this tradition of Church initiatives seeking to engage in dialogue with the human family about its various experiences and challenges. With its publication, we hope to shed the light of the Gospel and of Catholic Social Teaching (CST) on the specific area of economics and the world of finance which may be referred to as the management of financial assets or investing.