Walt Whitman Rostow (also known as Walt Rostow or W.W. Rostow) OBE (October 7, 1916 – February 13, 2003) was an American economist, professor and political theorist who served as National Security Advisor to President of the United States Lyndon B. Johnson from 1966 to 1969. Rostow never regretted or apologized over his actions in Vietnam, and this stance effectively ostracized him from work in top American universities after his retirement from government service. His older brother Eugene Rostow also held a number of high government foreign policy posts.