Drawing upon talks delivered at the Second Global Action Against Mass Atrocity Crimes conference, held in Manila 2016, this paper examines the extent to which the Asia Pacific region has begun to translate its commitment to the Responsibility to Protect (R2P) into practice. It finds that the so-called “East Asian Peace” has transformed the region from one of the world’s deadliest to one of the world’s most peaceful. But many key challenges remain and there is much to be done to make R2P and atrocity prevention a daily lived reality. This article proceeds in three parts. The first briefly describes the dramatic decline of atrocity crimes in East Asia. The second points to some key challenges on the ideational and institutional fronts. The third section turns specifically to the need to develop national architectures for atrocity prevention.