Slavery 165 Controversial literature 132 Catholic authors 63 Christianity 58 History 47 Religious aspects 47 Protestant authors 29 more ... Theology, Doctrinal 29 Religion 28 Politics and government 27 Civil war 24 Judaism 20 Apologetics 19 Islam 17 Doctrines 16 African Americans 14 Zionism 14 Justification 13 Reformed Church 13 Church history 11 Criticism, interpretation, etc 11 Society of Friends 11 Lutheran Church 9 Theology 9 Philosophy 8 Relations 8 Slavery and the church 8 Apologetic works 7 Atheism 7 Christianity and other religions 7 less ...