This article analyses the connections between conflict and development at the agriculture–pastoralism–wildlife interface from the perspective of human security. The article draws on empirical data (qualitative and quantitative) generated in Laikipia County, Kenya, and literature to illustrate that (1) the major issues which cut across each of these conflicts are related to natural resource management, cultural practices and governance, and (2) these cross-cutting issues impinge on people’s freedoms, extending these conflicts into cases of human insecurity. Specifically, each conflict type compounds the impacts of the others on farmer and pastoral economic, food, environmental, personal, community, health and political security.