History 51 Foreign relations 17 International relations 17 Civilization 16 Politics and government 15 Colonies 14 Discoveries in geography 14 Mais ... Discovery and exploration 14 Indians of North America 13 Public opinion 13 Emigration and immigration 10 Social conditions 8 Indians 7 Intellectual life 7 Europeans 6 Immigrants 6 Relations 6 American influences 5 Economic conditions 5 Foreign public opinion, European 5 Race relations 5 First contact with other peoples 4 Popular culture 4 Americanization 3 Colonization 3 Description and travel 3 Ethnic relations 3 Frontier and pioneer life 3 Government relations 3 Intellectuals 3 menos ...