Ten years after the Responsibility to Protect (RtoP) was unanimously adopted by the General Assembly in 2005, the international community is still faced with challenges of ensuring that genocide, crimes against humanity, war crimes, and ethnic cleansing are never again committed. In light of RtoP’s 10th anniversary and ongoing situations of mass atrocities around the world, the Columbia University Global Policy Initiative (CGPI) and the International Relations Research Center at the University of São Paulo (NUPRI) organized a two-day conference in April 2015 on Responsibility while Protecting: Implementation Mechanisms and the Future of the Responsibility to Protect. The conference brought together key academic, UN, and governmental voices....