Preface; M.Zacher PART 1: ARMS CONTROL The UN and Debates Over Weapons of Mass Destruction; N.Tannenwald Facing the Challenge of Small Arms: The UN and Global Security; K.Krause Improving the Effectiveness of UN Arms Embargoes; W.A.Knight PART 2: CONFLICT PREVENTION AND RESOLUTION When Aspiration Exceeds Capability: The UN and Conflict Prevention; A.Mack & K.Furlong Can the UN Still Mediate?; F.O.Hampson PART 3: REVERSING, DETERRING AND PUNISHING AGGRESSIONS Another Reluctant Belligerent: The United Nations and the War on Terrorism; E.C.Luck UN Sanctions: A Glass Half-Full?; A.Mack & A.R.Khan International Tribunals and the Criminalization of International Violence; J.Lee & R.Price PART 4: THE UN AND INTERVENTION From Peacekeeping to Peace-building: The United Nations and the Challenge of Intrastate War; A.G.Sens Refugee Protection and State Security: Towards a Greater Convergence; G.Loescher Authorizing Humanitarian Intervention; J.Welsh Developing Countries and the Intervention-Sovereignty Debate; R.Thakur PART 5: INSTITUTIONAL REFORM Conundrums of International Power-Sharing: The Politics of Security Council Reform; M.W.Zacher The UN, Regional Organizations and Regional Conflict: Is There a Viable Role for the UN?; B.L.Job Human Security: An Opening for UN Reform; L.Axworthy PART 6: CONCLUSIONS The League of Nations Redux?; R.Price