The year 2017 marked a shift in leadership at the United Nations as Secretary-General António Guterres began his term at a time of heightened global challenges. The world’s fastest-growing refugee crisis unfolded in Myanmar while the threat of famine loomed over Yemen, South Sudan, Nigeria and Somalia. Resolved to forestall crises before they occur, Secretary-General Guterres launched a series of reforms aimed at advancing mediation and prevention. These build on past successes, including the proud legacy left by the United Nations International Criminal Tribunal for the Former Yugoslavia, which closed its doors after reshaping the global approach to war crimes, crimes against humanity and genocide. As the United Nations rises to the world’s collective security challenges, the voices of the people most affected resound with greater meaning for our common future.