1893-1976 1908-1973 1913-1994 1916-1995 1920- 1924- 1955-1965 1965- 1975-1985 20thcentury 322 863 ambassadors american ana bernardw biography china civilization coldwar congresses daniel defenses detente diplomacy eastandwest economicassistance emotions espionage europe foreigneconomicrelations foreignrelations friendsandassociates governmentpolicy greatpowers harold history internationaleconomicrelations internationalfinance internationalrelations italy jean khoonchoy labordisputes lee mao militarypolicy nineteenseventies nineteensixty-eight nixon nuclearnonproliferation paranoia poirier politicalactivity politicalactivitypuértolas politicalandsocialviewsjohnson politicalaspects politicsandgovernment protestmovements psychologicalaspects psychologynixon psychologywilson rhetoric singapore socialconditions sources spain strategicaspects studentmovements students subversiveactivities terrorism treaties trust unitedstates visitsofstate worldhealth worldpolitics zedong 毛澤東