Subject
Imperialism
Territorial expansion
History
8
Political aspects
5
Foreign relations
4
Moral and ethical aspects
2
Philosophy
2
Politics and government
2
Administration
1
American literature
1
Boundaries in literature
1
Colonial influence
1
Colonial question
1
Colonies
1
Colonization
1
Constitutional history
1
Constitutional law
1
Culture conflict in literature
1
Economic aspects
1
Economic conditions
1
Economic integration
1
Evangelicalism
1
Exceptionalism
1
Foreign economic relations
1
Frontier and pioneer life
1
Frontier thesis
1
Geography in literature
1
Globalization
1
Historical geography
1
Historiography
1
History and criticism
1
Imperialism in literature
1
Influence
1
Land settlement
1
Liberty
1
Literature and history
1
Missionaries
1
Moral conditions
1
National characteristics, American
1
National characteristics, American, in literature
1
Power (Social sciences)
1
Social aspects
1
Social change
1
Social classes
1
Social conditions
1
Territories and possessions
1
Tourism
1
Transnationalism
1
Virtue
1