This chapter reflects upon the Libyan and Syrian case studies and extrapolates general trends and conclusions regarding the role that R2P played in both of them, with view to assessing the doctrine’s overall applicability, strengths, weaknesses, and acceptance by States. These findings are considered alongside other contemporary developments pertaining to R2P, most particularly from other mass atrocity situations, to gauge whether and how the Syrian and Libyan cases are likely to impact upon the doctrine’s future invocation or on the means of its implementation. The chapter concludes by tying together the various themes of the book, reflecting upon R2P’s overall standing in international law as well as its likely future trajectory given the Libyan and Syrian precedents.