Politics and government 1,600 Philosophy 647 Presidents 492 Psychological aspects 489 Psychology 461 POLITICAL SCIENCE 419 Political aspects 336 Prevention 265 PSYCHOLOGY 245 PHILOSOPHY 196 Poetry 179 Popular works 175 Photography 173 Public Policy 173 Patients 152 Political and social views 145 PERFORMING ARTS 138 Public opinion 131 Political science 130 Popular culture 125 Psychotherapy 121 Physics 116 Personnel management 113 Poets, American 113 Photography, Artistic 97 Popular music 95 Psychoanalysis 92 Popular Culture 91 Painting 90 Politique et gouvernement 90 Parent and child 89 Political activity 85 Painters 81 Philosophie 79 Police 74 Political culture 73 Poor 73 Poverty 72 Presidents' spouses 71 Physiology 67 Planning 65 Periodicals 64 Pollution 63 Population 61 Personality 57 Parenting 56 Psychiatry 56 People with disabilities 55 Political Freedom & Security 54 Peace 53 Political corruption 51 Power (Social sciences) 51 Psychologie 51 Post-traumatic stress disorder 49 Problems, exercises, etc 49 Psychology, Industrial 48 POETRY 47 Politics and literature 46 Personal narratives, American 45 Prehistoric peoples 45 Paleontology 44 Physicists 44 Physiological aspects 42 Political 42 Physicians 40 Public relations 40 Public speaking 40 Personal narratives 39 Political campaigns 39 Politicians 39 Politique gouvernementale 39 Prisons 39 Painting, American 38 Photographers 38 Political participation 38 Psychopathology 38 Public health 38 Physiological effect 37 Presidential candidates 37 Princesses 37 Public schools 37 Political Ideologies 36 Private investigators 35 Production and direction 35 Pictorial works 34 Poets, English 34 Prisoners of war 34 Protection 34 Public Health 34 Performance 33 Power resources 33 Prisoners 33 Public welfare 33 Picture books 32 Plants 32 Political Process 32 Political prisoners 32 Problem solving 32 Philosophy, Ancient 31 Prejudices 31