A mixture of "cheats" and "co-operators" can enable maximal group benefit.
Is a group best off if everyone co-operates? Theory often considers this to be so (e.g.the "conspiracy of doves"), this understanding underpinning social and economic policy.We observe, however, that after competition between Pressure Prevention "cheat" and "co-operator" strains of yeast, population fitness is maximized under co-existence.To addres