The idea of the common good was borrowed by the Fathers of the early Catholic Church from the rich philosophical traditions of ancient Greece and Rome. It has been a fundamental part of Catholic thinking about social, political, and economic life throughout the Catholic intellectual tradition, from Augustine and Aquinas to modern Catholic social thought in the encyclicals of popes in recent centuries. Yet this history has been rooted in the traditions of philosophy and theology. With the rise of the social sciences in the nineteenth century as distinct disciplines no longer limited to the...