Americans History, Modern 673 Documentary films 612 History 606 Foreign study 240 Current affairs 197 Social sciences 193 more ... Enthnology 186 Travel 167 Sociology 141 Television series 139 Ethnicity 136 History, Military 127 Slavery 119 Artists 113 Social life and customs 102 Political science 101 Indigenous peoples 84 Science 84 Criminal law 83 Description and travel 65 Economics 65 Intellectual life 65 Authors, American 63 Health 55 Race 55 Mass media and culture 54 Arts 51 Human rights 51 Business 46 less ...