Peace is an elusive concept, especially within the field of international law, varying according to historical era and between Research Handbook responds to the gap created by the neglect of peace in international law scholarship. Explaining the normative evolution of peace from the principles of peaceful co-existence to the UN declaration on the right to peace, this Research Handbook calls for the fortification of international institutions to facilitate the pursuit of sustainable peace as a public good. It sets forth a new agenda for research that invites scholars from a broad array of disciplines and fields of law to analyse the contribution of international institutions to the construction and implementation of sustainable peace. With its critical examination of courts, transitional justice institutions, dispute resolution and fact-finding mechanisms, this Research Handbook goes beyond the traditional focus on post-conflict resolution, and includes areas not usually found in analyses of peace such as investment and trade law. Bringing together contributions from leading researchers in the field of international law and peace, this Research Handbook analyses peace in the context of law applicable to women, refugees, environmentalism, sustainable development, disarmament, and other key contemporary issues. This thoughtful Research Handbook will be a crucial tool for policymakers, practitioners, and academics in the fields of international law, human rights, jus post bellum, and development. Its comprehensive insights to the field will also be of benefit for students of political science, law, and peace studies. Contributors: B.A. Andreassen, C.M. Bailliet, D. Behn, K. Egeland, O. Engdahl, O.K. Fauchald, J. Garcia-Godos, C. Hellestveit, M. Janmyr, S. Kanuck, K.M. Larsen, K. Liden, G. Nystuen, S. O'Connor, J.C. Sainz-Borgo, K. Skarstad, V.B. Strand, H. Syse, A Tadjdini, C. Voigt, C. Weiss, P. Wrange, G. Zyberi