Economic aspects History 388 Economic conditions 286 Government policy 219 Social aspects 213 Agriculture 210 Political aspects 135 more ... Emigration and immigration 121 Technological innovations 112 Law and legislation 97 Education 92 Social conditions 90 Education, Higher 85 World War, 1939-1945 85 Finance 79 Economic policy 77 Globalization 68 Environmental aspects 64 Foreign economic relations 55 Politics and government 53 Economic history 52 Agriculture and state 49 Slavery 49 Climatic changes 48 Environmental policy 47 Economics 46 Capitalism 45 Immigrants 45 World War, 1914-1918 45 Small business 44 less ...