Politics and government 1,586 Philosophy 650 Presidents 491 Psychological aspects 484 Psychology 465 POLITICAL SCIENCE 414 Political aspects 331 Prevention 266 PSYCHOLOGY 242 PHILOSOPHY 192 Poetry 178 Popular works 175 Photography 172 Public Policy 170 Patients 151 Political and social views 145 PERFORMING ARTS 135 Political science 134 Public opinion 131 Popular culture 121 Psychotherapy 118 Physics 116 Poets, American 113 Personnel management 112 Popular music 95 Photography, Artistic 94 Psychoanalysis 91 Painting 90 Politique et gouvernement 89 Popular Culture 88 Parent and child 87 Political activity 82 Painters 80 Philosophie 77 Police 73 Poor 73 Presidents' spouses 71 Political culture 70 Poverty 70 Physiology 67 Planning 65 Periodicals 64 Pollution 63 Population 61 Parenting 57 Personality 56 Psychiatry 56 People with disabilities 55 Peace 53 Political Freedom & Security 53 Political corruption 50 Power (Social sciences) 50 Post-traumatic stress disorder 49 Problems, exercises, etc 49 Psychologie 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 41 Public relations 40 Personal narratives 39 Physicians 39 Political campaigns 39 Politicians 39 Politique gouvernementale 39 Prisons 39 Public speaking 39 Painting, American 38 Political participation 38 Psychopathology 38 Physiological effect 37 Presidential candidates 37 Princesses 37 Public health 37 Public schools 37 Photographers 36 Public Health 36 Production and direction 35 Poets, English 34 Political Ideologies 34 Prisoners of war 34 Protection 34 Performance 33 Pictorial works 33 Power resources 33 Prisoners 33 Public welfare 33 Picture books 32 Plants 32 Political Process 32 Political prisoners 32 Private investigators 32 Problem solving 32 Psychophysiology 32 Prejudices 31