World politics-1945-1989 Cold war 1 Geopolitics-History-20th century 1 Great powers-History-20th century 1 Pacific settlement of international disputes 1 Peace-International cooperations 1 Peaceful change 1 Presidents-United States-History-20th century 1 Statesmen-United States-History-20th century 1 United States-Foreign relations-1969-1974 1 United States-Foreign relations-1974-1977 1 United States-Foreign relations-1977-1981 1 United States-Foreign relations-Decision making 1 World politics-1989 1