Much attention has been paid to the role of increased food production in thedevelopment of social complexity. However, increased food production is onlyone kind of agricultural process, and some changes in agronomic practiceswere geared toward stabilizing production or counteracting periodicshortfalls. The intersection between these latter strategies andsociopolitical development are poorly understood, while the long-term valueof risk management strategies is often hypothesized but empirically not welldemonstrated. We address these issues using recent archaeological data fromthe Samoan Archipelago, Polynesia. We investigate variability in, and thedevelopment of, one type of agricultural infrastructure: ditch- and-parcelcomplexes. In the context of Samoa’s high-volume rainfall, recurrentcyclones, and steep topography, these novel risk management facilitiesoffered production stability and, by extension, long-term selective benefitsto both emergent elites and the general populace. Their effectivenessagainst known hazards is demonstrated by hydrologicai modeling, while theirlong-term success is indicated by increased distribution and size over time.Additionally, based on their morphologies, funetional properties,chronology, and spatial patterning, we argue that this infrastructure couldhave been effectively used by emergent elites to gain political advantage,particularly in conjunction with environmental perturbations that createdproduction bottlenecks or shortfalls.