Political activity History 118 Politics and government 111 Armed Forces 86 College students 68 Working class 57 Labor unions 52 Students 48 Trade-unions 39 Student movements 15 Youth 15 Radicalism 13 Social conditions 13 Biography 9 Economic conditions 9 Industrial relations 9 Political participation 9 Civil supremacy over the military 8 Intellectuals 8 Middle class 8 Officials and employees 8 Labor policy 7 Political aspects 7 Socialism 7 Universities and colleges 7 Case studies 6 Communism 6 Congresses 6 Military policy 6 Peasantry 6