Close to the New School movement of the 1920s, Piaget was de facto at the core of the international education scene in 1929 when he accepted the position of director of the International Bureau of Education. For 40 years he led this organization based in Geneva, which centralized and coordinated the educational programs of many nations. After World War II, he collaborated with UNESCO producing texts that provided guidelines for education. But at the same time as he developed his epistemological work, it was the reception of his psychological ideas in the educational spheres of different countries that transformed him into a revolutionary pedagogue.