 The structuralist approach came to Mexico in a big way with Carlos Ulises Moulines who moved to IIF from Munich in the mid-1970s. Born in Venezuela, he studied in Europe, first under the supervision of Jesús Mosterín in Barcelona and then of Wolfgang Stegmüller in Munich. His early focus was on the rise of the logical empiricist approach, particularly the projects of logical reconstruction of the empirical world variously advocated by Bertrand Russell, Rudolf Carnap, and Nelson Goodman; Moulines developed these investigations in his first monograph, La Estructura del Mundo Sensible (1973). He took an interest in integrating some of Stegmüller’s original contributions into earlier structuralist work by Patrick Suppes in the United States and Gunther Ludwig in Germany, an effort displayed by some of his articles from this period (notably Moulines 1975, 1976). Responding to the historical turn in philosophy of science, Moulines, like Joseph Sneed in the United States and Stegmüller in Germany, focused on the issue of theory change. He devoted much of his research during the 1970s and 1980s to the dynamics of theories, applying the resources of diachronic structuralist reconstruction and Kuhnian analysis (in terms of disciplinary matrices) to the development of Newtonian mechanics and equilibrium thermodynamics. The resulting investigations were presented in the book Exploraciones Metacientíficas (1982). Moulines became an important intellectual force at IIF where he stayed for over a decade, engaged in cutting-edge research that made him a leading figure in the international structuralist movement. In Moulines’ view, scientific theories are cultural constructs of philosophical interest. He regards philosophy of science as a discipline whose epistemology is primarily interpretive rather than prescriptive or descriptive—a theorization about theorizations. A good proportion of the philosophy of science conducted at IIF during his tenure was directly influenced by him. A relevant point for present purposes is that his work in Mexico during these years reached the highest levels within the worldwide structuralist movement. In 1984 Moulines left the country, first to Bielefeld University, then to Berlin, and finally to the Center for Mathematical Philosophy at Ludwig-Maximilians University, Munich, where he became Stegmüller’s successor and is now a Professor Emeritus. Many of his subsequent publications had a lasting impact in Latin America, notably An Architectonic for Science: The Structuralist Program (Balzer, Moulines, and Sneed 1987), along many papers.