Slavery 900 Enslavement 878 Politics and government 646 History 283 Extension to the territories 185 African Americans 120 Antislavery movements 95 Campaign literature 95 Slavery and the church 92 Anti-enslavement movements 87 Enslavement and the church 87 Enslaved persons 86 Rare books 84 Reconstruction (U.S. history, 1865-1877) 77 Catholic Church 66 States' rights (American politics) 63 Abolitionists 56 Emancipation 55 Law and legislation 55 Slave trade 51 Diplomatic relations 48 Foreign relations 48 Moral and ethical aspects 47 Bound-with books 45 Trade of enslaved persons 45 Fugitive slaves 44 Spiritual life 44 Christian life 43 Meditations 43 Mexican War, 1846-1848 41