Economic aspects Imperialism 26 History 13 Capitalism 10 Colonies 8 Political aspects 7 Globalization 5 Social aspects 5 Commerce 4 Economic conditions 4 Economic development 4 Foreign economic relations 3 Foreign relations 3 Race relations 3 Slavery 3 Social conditions 3 Territorial expansion 3 Cotton growing 2 Emigration and immigration 2 Government policy 2 Neoliberalism 2 Racism 2 Slave trade 2 Social change 2 Administration 1 African Americans 1 Agricultural laborers, Foreign 1 Agriculture 1 Agriculture and politics 1 Banana trade 1