The group of philosophers who adopted some form of vitalism were strongly influenced by Bergson. On early versions of this approach, a positivist anthropology was rejected on grounds that it has no place for freedom. Among the most important early proponents of this view were Vaz Ferreira (Uruguay), Alejandro Deústua (Peru), Antonio Caso (Mexico), Enrique Molina (Chile) and Alejandro Korn (Argentina). In the work of both Caso and Vaconcelos, the distinctive character of human beings is consciousness of a sort that is purportedly at odds with deterministic or mechanistic views of the world.