Since the founding of the United Nations, the Yearbook of the United Nations has stood as the authoritative reference work on the annual actions and achievements of the Organization. As with the preceding sixty-eight volumes of the Yearbook, the present—sixty-ninth—volume composes a peerless resource contextualizing the deliberations of the United Nations on peace and security matters, human rights, economic and social questions, legal issues, and administrative and budgetary topics. Providing a clear-eyed, impartial and accurate narrative of the Organization, the 2015 edition of the Yearbook describes the efforts by the United Nations to reach major multilateral milestones—foremost the 2030 Agenda for Sustainable Development. The volume also highlights efforts to ease the severe humanitarian and political crisis in the Syrian Arab Republic, which entered its fifth year; support recovery in Afghanistan; and attain a diplomatic resolution to the conflicts in Yemen and in the eastern part of Ukraine. The volume further documents how the United Nations supported the more than 1 million refugees reaching the shores of Europe in flight from conflict and violence, along with its success in helping victims of the genocide against the Tutsi in Rwanda attain legal recourse to justice.