History 1,725 World War, 1914-1918 158 Politics and government 146 Communism 137 Foreign relations 85 Protest movements 65 Personal narratives 55 more ... Campaigns 45 Social conditions 44 Causes 41 Influence 37 Fiction 33 Revolutionaries 31 Socialism 29 Generals 28 Russians 28 Economic conditions 25 Revolutions 22 Refugees 21 Working class 21 Jews 20 Social life and customs 20 Sources 19 Political activity 18 Historiography 17 Intellectual life 15 Philosophy 15 Political and social views 13 Secret service 13 Court and courtiers 12 less ...