Colonies History 200 Imperialism 45 Administration 26 Foreign relations 24 Politics and government 22 Decolonization 17 Race relations 17 Slavery 13 Slave trade 12 Social aspects 12 Social conditions 12 Women 12 Civilization 11 Economic conditions 11 Postcolonialism 10 Political aspects 9 Public opinion 9 Slavery in literature 9 Economic policy 8 Emancipation 8 Slaves 8 Commerce 7 Emigration and immigration 7 Colonization 6 Racism 6 Historiography 5 Indigenous peoples 5 Nationalism 5 Relations 5