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The emergence of cooperation in social dilemmas has been addressed in a number of fields. In this paper, we illustrate how robust cooperation can emerge among a population of agents participating in a N-player dilemma when the agents are spatially arranged on a graph exhibiting small world properties. We present a graph structure with a high level of community structure, small diameter and a variance in the node degree distribution. We show that with simple learning rules, robust cooperationdblp:conf/alife/ORiordanCS08 fatcat:qo34c4gwjrerlg2mz5s3yhidya