1881-1963 1894-1971 1894-1986 1905-1961 1908-1973 1913-1960 1917-1963 1945-1955 1945-1961 1945-1990 1945-1991 1961-1989 1963 1965-1975 20thcentury albert american berlin berlin(germany) berlinwall bernardw chronology coldwar communiststrategy dag economicassistance europe foreigneconomicrelations foreignrelations germany governmentpolicy greatbritain hammarskjöld harold history historyunitednations humansecurity john kennedy khrushchev macmillan militarypolicy nationalsecurity nikitasergeevich nuclearnonproliferation nucleartest-bantreaty poirier politicalandsocialviewscamus politicalandsocialviewsjohnson politicalethics politicsandgovernment politiqueetgouvernement politiquemondiale protestmovements relationsextérieures russia) sovietunion unitednations unitedstates worldhealth worldpolitics