Philosophy 20 Political science 11 History 8 Ethics 6 Homescience 4 Natural law 4 Western Philosophy 4 Atmospheric chemistry 3 Early works to 1800 3 Food poisoning 3 History and criticism 3 Political Science 3 Sociology 3 State, The 3 Water conservation 3 Accounting 2 Climatology 2 Criticism and interpretation 2 Emotions 2 English literature 2 Geology 2 Hobbes, Thomas 2 International relations 2 Leviathan 2 Meteorology 2 Natural products 2 Philosophy, Modern 2 Physical chemistry 2 Political thought 2 Restoration ecology 2