United Nations (UN) peacekeeping operations are regularly evaluated and critiqued by both scholars and policy-makers, however this scrutiny is commonly restricted to program- and project-level effects. This neglects the unique impacts that emerge from the individuals who populate interventions and those they encounter in conflict-affected communities. The objective of this research is to place these individuals, and their actions and relationships, at the centre of analysis and investigate their impacts independent of, or distinct from, program-level effects. Through the case study of south Lebanon and the United Nations Interim Force in Lebanon (UNIFIL), this dissertation explores the social and physical spaces that connect peacekeepers and Lebanese individuals in the course of their everyday lives and actions. Through the theoretical lenses of cultural peacebuilding and hybridity, I conceptualize the meaning of these relationships to the individuals involved, to the UNIFIL mission, and to peace at a broader level. This political ethnography undertakes a complex, relational approach to understanding intervention impacts and effectiveness, thereby 'peopling' a UN peacekeeping operation. Based on original empirical data consisting of 82 ethno-biographical interviews with Lebanese individuals and UNIFIL veterans, alongside 14 months of participant and field observation, I argue that Lebanese people agentially transform superficial, formal encounters with peacekeepers into substantial, impactful relationships through the Lebanese culture of hospitality. In informal, private and local spaces and contexts, 'thick' identities are enacted and cultural exchange occurs, which transforms and hybridizes the knowledges and identities of both peacekeepers and Lebanese people. Through this process of hybridization, interlocutors emerge who facilitate the connections of others in their social networks and function as bridges across the international-local divide. This hybridization augments UNIFIL's access to local knowledge, which improves local support and operational effectiveness. Further, the relationships and connections between peacekeepers and Lebanese people contribute to the restoration or amelioration of Lebanese human identity needs, which are threatened by the conflict with Israel and the ways in which it intersects with intrastate tensions. This constitutes incremental change productive to complex pathways toward peace in south Lebanon.