In the broadest sense of the term, “Thomism” refers to a set of ideas and principles, both in philosophy and theology that can be considered as derivations or representations of the thought of Thomas Aquinas. However, Thomism should not be considered as a mere conceptual body. It also represents a certain view and way of doing philosophy and theology. Alasdair MacIntyre, in his book Three Rival Versions of Moral Enquiry, argues that the Thomistic approach provides a coherent and skillful point of view for dealing creatively and critically with opposing views, contrasting this approach with the encyclopedic and the genealogical approaches. The former imposes a single worldview, enclosing knowledge and “truth” in a monolithic structure of “progress,” while the latter, following Nietzsche, devalues and relativizes knowledge, reducing it to a multiplicity of perspectives, each with its own claims to truth, leading to incommensurability and the consequent subjugation of “truth” to the law of the strongest. On the other hand, Thomists have adopted, from the end of the thirteenth century to the present day, different styles and ways of thinking while maintaining dialogue with their “predecessors” and at the same time with their contemporaries, that is, Thomists are capable of what MacIntyre called the “rationality of tradition”.