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The emergence and maintenance of cooperation within sizable groups ofunrelated humans offer many challenges for our understanding. We propose thatthe humans' capacity of communication, such as how many and how far away thefellows can build up mutual communications, may affect the evolution ofcooperation. We study this issue by means of the public goods game (PGG) with atwo-layered network of contacts. Players obtain payoffs from five-person publicgoods interactions on a square lattice (the interaction layer). Also, theyupdate strategies after communicating with neighbours in learning layer, wheretwo players build up mutual communication with a power law probabilitydepending on their spatial distance. Our simulation results indicate that theevolution of cooperation is indeed sensitive to how players choose others tocommunicate with, including the amount as well as the locations. The tendencyof localised communication is proved to be a new mechanism to promotecooperation.

Promote cooperation by localised small-world communication