It is widely recognised that the Responsibility to Protect (RtoP), adopted by heads of state and government in 2005, is an important new international principle. Australia has been one of the principle's most significant contributors, with prominent Australians and governments from both sides of politics contributing to its development, emergence, and implementation. This article traces and explains Australia's contribution to RtoP and asks what more it might do to assist in its implementation. It argues that Australia's commitment to RtoP is informed by a synergy of values and interests and has been strengthened by the Rudd government's reengagement with multilateralism. It concludes by calling for the development of a whole-of-government strategy for implementation and by suggesting some policy avenues that might be considered.