This paper takes a general approach to the philosophy of Francisco Suarez in order to show the importance of his contributions to the configuration of modern economics. Indeed many consider Suarez to be the main channel through which Duns Scotus and William of Ockham's philosophy was transmitted to modern thought. Although not intentionally, Suarez's effort to end the political problems of the sixteenth century, based on the idea of "pure nature", led to a secular conception of the world, which resulted in a rationalist and static conception of law with important consequences in shaping the new social and political order. Herein, we contrast this original approach with that of Thomas Aquinas, who we consider the leading exponent of the classical paradigm, to demonstrate the influence Suarez had on the genesis of modern economic theory.