From April 1952, Nhu's ideas on Personalism were delineated in his speech at Vietnamese National Military Academy in Da Lat. He contended that, initially, Personalism was a Catholic ideology, though it had universal relevance and was compatible to Vietnam, which had to suffer from the devastation of wars. For Nhu, Personalism was a form of Revolution which was more transformative than Marxist socialism, and he described himself as an advocate of "personalist revolution". Ngô Đình Diệm also understood the term "Personalism" in the etymology of "nhân vị", which could mean either "humanity" or "human being". The Ngô brothers used the term "Personalist Revolution" to frame their nation-building programs. On 26 October 1956, the Republic of Vietnam's Constitution was promulgated. Its preface declared that "Building Politics, Economy, Society, Culture for the people basing on respecting Personalism". Simultaneously, Diệm's regime laid down as a policy the teaching of Personalism in universities and the propaganda of the doctrine in South Vietnam.