The work of these authors and the visit of the popular Spanish philosopher José Ortega y Gasset, opened Latin American philosophical anthropology to the influence of a new wave of European philosophers. In particular, Husserl, Dilthey, Scheler, and Hartman gave rise to a different approach within philosophical anthropology: the anthropology of the spirit. Among the most important proponents of this view were Samuel Ramos (Mexico), Francisco Romero Argentina), Risieri Frondizi (Argentina), Francisco Miró Quesada (Peru), and Leopoldo Zea (Mexico). For Ramos, feeling, not reason, is the central feature of humanity. For Romero, the characteristic that identifies humans is duality; for Miró Quesada, the fundamental question is metaphysical, namely, “What is human?” Doubts about the possibility of finding an adequate theory tended to turn the challenge into an epistemic rather than metaphysical matter.