 Concerning the professionalization of philosophy in Mexico, Eduardo García Máynez stands out both for his philosophical and for his administrative contributions. In 1940–41, García Máynez founded and was the first director of the Centro de Estudios Filosóficas, which was eventually renamed the Instituto de Investigaciones Filosóficas, and he founded the influential journal Filosfía y Letras, which continued to be published until 1958. His book Los principios de la ontología formal del derecho y su expresión simbólica (1953) marked the beginning of the logical turn in Mexican philosophy, anticipating the linguistic turn of analytic philosophy in Mexico a decade later. Some of his other works include: La definición del derecho. Ensayo de perspectivismo jurídico (1948) and Filosofía del derecho (1974). García Máynez claimed that the validity of the law depends on the existence of objective values, but he added that, in spite of their objectivity, values are subject to several forms of relativism in relation to culture, concrete practice, and geography. Like Ramos, García Máynez believed Mexico needed an objectivist axiology to progress socially. He also claimed that legal freedom was a “second order” right, that is, a normative right to exercise certain independent faculties through choice. The development of this thesis forced him to sustain that any system of normativity that is axiomatic and formal contains a priori principles. His “theory of the three circles” maintains that the definitions of law as formally valid, as intrinsically valid, and as a positive right are not theoretically compatible, though they are compatible in practice.