 Not all philosophers were enthusiastic about applying philosophy to Mexican themes. For example, Francisco Larroyo was the main representative of Neo-Kantianism in Mexico, and wrote many books in defense of Neo-Kantian views on philosophy, science, and education, including La filosofía de los valores (1936) and La lógica de las ciencias (1938). Larroyo claimed that Mexico’s progress required a rigorous, rationalist, and scientific philosophy. Another well-known Neo-Kantian and Kelsenian was Guillermo Héctor Rodríguez.