This book demonstrates how the advocacy-focused framework explains the origins of three workstreams of contemporary UN peacekeeping operations: communication, protection, and reconstruction. The issue of strategic communications was promoted by UN officials through the strategy of persuasion. Protection of civilians emerged due to a partially successful social influence campaign by a coalition of elected Security Council members and a subsequent (and successful) persuasion efforts by Canada. Quick impact projects entered peacekeepers' practice as the result of 'authority talk' by an expert panel. The three issues illustrate the diversity of pathways to change in international organizations, representing the top-down, bottom-up, and outside-in pathways. Moreover, they have achieved different degrees of institutionalization in UN's policies, structures, and frameworks: protection of civilians is the most institutionalized, as evidenced by measures to hold peacekeepers accountable for non-implementation, while quick impact projects are the least institutionalized.