History 35 Saving and investment 24 Slaves 21 Slavery 20 Slave trade 15 Economics 13 Expenditure 12 Human rights 12 Income tax 12 India 12 Public debt 12 Taxation 12 personal saving 11 African Americans 10 Capitalism 10 Income and expense management-- Financial management 10 Literature 10 Investments-- Financial economics 9 Agriculture 8 Biography 8 Social conditions 8 Criticism 7 Economic development 7 English literature 7 Imperialism 7 Saving 7 Women 7 Domestic saving 6 Indian Economy 6 Savings 6