PT  - JOURNAL ARTICLE
AU  - Alan N. Tump
AU  - Charley M. Wu
AU  - Imen Bouhlel
AU  - Robert L. Goldstone
TI  - The Evolutionary Dynamics of Cooperation in Collective Search
AID  - 10.1101/538447
DP  - 2019 Jan 01
TA  - bioRxiv
PG  - 538447
4099  - http://biorxiv.org/content/early/2019/02/01/538447.short
4100  - http://biorxiv.org/content/early/2019/02/01/538447.full
AB  - How does cooperation arise in an evolutionary context? We approach this problem using a collective search paradigm where interactions are dynamic and there is competition for rewards. Using evolutionary simulations, we find that the unconditional sharing of information can be an evolutionary advantageous strategy without the need for conditional strategies or explicit reciprocation. Shared information acts as a recruitment signal and facilitates the formation of a self-organized group. Thus, the improved search efficiency of the collective grants byproduct benefits to the original sharer by altering the interaction structure. A key mechanism is a visibility radius, where individuals have access to information about neighbors within a limited distance. Our results show that for a variety of initial conditions and across both static and dynamic fitness landscapes, there is strong selection pressure for unconditional sharing.