Figure 3. Color-coded fraction of cooperators f_C on the T − S parameter plane, as obtained when conformists are selected from low-degree players.

Left panel shows the results obtained on scale-free networks, while the right panel shows the results obtained on Erdős-Rényi random networks. In both cases the fraction of the population that act as conformists was ρ = 0.7. We note that, in the absence of conformists, and since we use degree-normalized payoffs, cooperation is practically absent in the depicted T − S range. Networks with N = 10⁴ nodes have been used, and the presented results are averages over 1000 independent realizations.