Peace -- 16 Peace 10 Foreign relations -- 7 World War -- 5 Diplomatic history -- 3 Foreign relations 3 International relations 3 more ... National security -- 3 Peace movements -- 3 Conflict management 2 Congresses 2 Diplomacy 2 Economic aspects 2 History 2 History -- 2 Negotiation 2 Pacific settlement of international disputes 2 Politics and government -- 2 Security, International 2 Study and teaching 2 Yearbooks -- 2 Aparthied -- 1 Appropriations and expenditures 1 Armed forces -- 1 Arms control -- 1 Audio-visual aids -- 1 Bibliography 1 Bibliography -- 1 Case studies 1 Case studies -- 1 less ...