 In philosophy of science CLE supports significant research on the character and structure of modern science as well as its concepts and theories—conducted from a variety of perspectives, including investigations in science teaching and the uses of philosophy of science in education. Critical dialogue has been fostered through seminars, distinguished international visits, research funding, faculty and student exchanges, interdisciplinary studies, and the publication of monographs and papers by Brazilian authors as well as translations of major works into Portuguese. Post-graduate studies and postdoctoral fellowships in logic and philosophy of science are thriving accordingly at UNICAMP. One scheme developed by CLE to attract promising faculty recently graduated from institutions worldwide produced excellent results. In the 1980s Michel Ghins and Harvey Brown energized analytic activity on space-time physics. Steven French did likewise in advancing the model-theoretic approach and the metaphysics of quantum mechanics at Campinas. With the help of these and other recruits, philosophy of physics, mathematics, and formal approaches to the philosophy of science thrived. At Campinas, French and da Costa started a long-lasting collaboration that proved remarkably fertile, resulting in influential contributions to current debates on the metaphysics of quantum mechanics, structuralism, and the semantic approach to theories, as well as a fresher way of looking at the concept of truth (“pragmatic truth” and “partial truth”). These collaborations led to many papers (Da Costa and French 1989, 1990, 1991, 1993) as well as a book in 2003, Science and Partial Truth: A Unitary Approach to Models and Scientific Reasoning, which received international acclaim for the light it casts on philosophical logic, structuralism, and realism. Brown and French made Brazil their country, and it is easy to imagine how different the geography of philosophy of physics and mathematics might have turned out had circumstances in Brazil been a little kinder to academic life in the 1980s. Together with da Costa, the international recruits and the local talents they began to nurture would have probably turned CLE and USP (where Otávio Bueno had worked with da Costa) into top centers for philosophy of science in the world. Destiny dictated otherwise, however; Ghins left to a professorship at Louvain-la-Neuve, Belgium; Brown moved to a distinguished career at Oxford, where he is now professor of the philosophy of physics; and French went to the United States and then back to England where he is now professor of philosophy of science at the University of Leeds and Editor-in-Chief of The British Journal for the Philosophy of Science. Brown and French have each served terms as presidents of the prestigious British Society for the Philosophy of Science. Happily, all these international old members maintain productive ties with Brazilian groups. CLE has continued to prosper over the last two decades.