Civilization -- 20 Civilization 11 History -- 9 National characteristics, American 4 Social conditions -- 4 Political culture -- 3 Politics and government -- 3 more ... English language -- 2 History 2 Africans -- 1 Civil defense 1 Cold War 1 Cold War -- 1 Congress 1 Conspiracies -- 1 Democracy -- 1 Dictionaries, Juvenile 1 Economic conditions 1 Economic conditions -- 1 Feminism -- 1 Foreign public opinion 1 Foreign relations 1 Freedom of speech -- 1 Freedom of the press -- 1 History, Modern -- 1 Influence 1 International relations 1 Japanese influences 1 Literary collections 1 Middle classes -- 1 less ...