The International Commission on Intervention and State Sovereignty's report, The Responsibility to Protect, argues that when a state is unable or unwilling to uphold its citizens' basic human rights, such as in cases of genocide, ethnic cleansing, and crimes against humanity, the international community has a responsibility to protect these citizens by undertaking humanitarian intervention. An essential issue, however, remains unresolved: which particular agent in the international community has the duty to intervene? In this article, I critically examine four ways of assigning this duty. Although I highlight the benefits of institutionalising the responsibility to protect, I argue that we should adopt, in the short term at least, a consequentialist solution: humanitarian intervention should be the responsibility of the intervener that will be the most effective.