This chapter examines the role of humanitarian intervention in world politics. It considers how we should resolve tensions when valued principles such as order, sovereignty, and self-determination come into conflict with human rights; and how international thought and practice has evolved with respect to humanitarian intervention. The chapter discusses the case for and against humanitarian intervention and looks at humanitarian activism during the 1990s. It also analyses the responsibility to protect principle and the use of force to achieve its protection goals in Libya in 2011. Two case studies are presented in this chapter. The first one looks at Myanmar and barriers to intervention. The second one centres on the role of Middle Eastern governments in Operation Unified Protector which took place in 2011 in Libya.