History 158 Social conditions 81 World War, 1939-1945 72 Social life and customs 69 Politics and government 48 Women 46 Economic conditions 36 Social aspects 26 Psychological aspects 24 Marriage 20 Jews 19 Treatment 19 Airplanes, Military 17 Race relations 17 Families 16 Industrial design 16 Assassination 15 Documentary films 15 Religious aspects 15 Rites and ceremonies 15 AIDS (Disease) 14 Motion pictures 14 Older people 14 Prevention 14 Racism 14 Production and direction 13 Accidents 12 Civil rights 12 Dance 12 Description and travel 12 Education 12 Emigration and immigration 12 Terrorism 12 African Americans 11 Family relationships 11 Music 11 Navies 11 Sea-power 11 Airplanes 10 Cultural assimilation 10 Economic aspects 10 Foreign relations 10 Holocaust, Jewish (1939-1945) 10 Indians of South America 10 International relations 10 Murder 10 Religion 10 Vietnam War, 1961-1975 10 Aircraft accidents 9 Capital punishment 9 Death and burial 9 Family violence 9 Military weapons 9 Patients 9 Sex 9 Arab-Israeli conflict 8 Children 8 Crimes against 8 Design 8 Ethnic relations 8 Fighter planes 8 Immigrants 8 Love 8 Sex role 8 Sexual behavior 8 Suicide 8 Theater 8 Alzheimer's disease 7 Autism 7 Child sexual abuse 7 Civilization 7 Employment 7 Female genital mutilation 7 Indians of North America 7 Islam 7 Law and legislation 7 Medical care 7 Political aspects 7 Refugees 7 Rehabilitation 7 Women's rights 7 Arranged marriage 6 Ballets 6 Body image in women 6 Campaigns 6 Child abuse 6 Cold War 6 Courtship 6 Death 6 Diseases 6 Down syndrome 6 Ethnic identity 6 Ethnology 6 Government policy 6 Healing 6 Homosexuality 6 Judaism 6 Naval operations 6 Psychology 6 Religious life and customs 6