  Philosophy in Latin America, as with all other cultural enterprises, has been closely related to European culture since colonial  times.[2] It is against a background of Thomist, Marxist, positivist, phenomenological, existentialist and idealistic philosophy that the works of authors like Frege, Russell, Quine, Carnap, Wittgenstein, Strawson and others were introduced. Analytic philosophy developed heterogeneously across Latin America. The analytic tradition appears in Argentina and Mexico in the mid-twentieth century, and to a lesser extent in Brazil, Peru, Colombia and Uruguay in the same period. The development in Argentina and Mexico was much faster, and analytic philosophy had matured in the two countries by the 1980s. Strong institutions there, created by early analytic philosophers (e.g., the Instituto de Investigaciones filosóficas at the Universidad Nacional Autónoma de México (IIF-UNAM) and the Sociedad Argentina de Análisis Filosófico (SADAF)), played an important role. The development of analytic philosophy was more limited in other countries where there were only isolated figures who, in many cases, left no students.