Figure 6. Simulation results for three different cultures (Machiavellian, Cooperative, Complex) and three levels of between-group competition (15 – very strong, 40 – moderate, 800 – absent). Averages from 10 model runs are shown. For Memory clogging, averages are shown for years 1 – 70000; for other parameters, averages are shown for years 50000 – 70000.