Entropy from the 1000th to 2000th generations (averaged over 1000 simulation runs, excluding the runs resulting in extinction) as a function of the benefit-to-cost ratio of cooperation in the three models.

<p>Entropy from the 1000th to 2000th generations (averaged over 1000 simulation runs, excluding the runs resulting in extinction) as a function of the benefit-to-cost ratio of cooperation in the three models.