Natural history 405 History 328 Nature 287 History and criticism 255 Nature in literature 251 Natural resources 235 Effect of human beings on 165 more ... Philosophy of nature 135 Natural law 134 Philosophy 129 Nature conservation 119 Nature and nurture 118 Conservation of natural resources 112 Human ecology 109 Environmental policy 104 Essence, genius, nature 96 Naturalism in literature 85 Description and travel 82 Natural selection 72 American literature 64 Management 63 Naturalism 61 Religious aspects 61 Environmental aspects 59 Knowledge and learning 55 Natural theology 55 Social aspects 55 Natural disasters 53 Islam 52 Ecology in literature 49 less ...