Man-woman relationships 378 History 254 World War, 1939-1945 169 Families 98 Murder 87 Social life and customs 71 Friendship 68 more ... Human-alien encounters 66 Good and evil 61 Police 61 Revenge 59 Campaigns 57 Fathers and sons 55 Criminal behavior 52 Social conditions 49 Women 46 Criminal investigation 42 High school students 41 Soldiers 41 Conduct of life 40 Film adaptations 40 Serial murderers 39 Male friendship 37 Love 35 Vampires 35 World War, 1914-1918 35 Fathers and daughters 33 Investigation 33 Politics and government 33 Death 32 less ...