The research concentrates on the interplay of ecology and geography, as well as the expansion of military advancements and forecasts that choice for ultra-social institutions that allow for mutual effort in large groups of
genetically unrelated individuals and large - scale sophisticated states, is better where warfare is more extreme.
In fact, scientists found that these ultra-social institutions that allow for cooperation in huge groups of
genetically unrelated individuals and large - scale complex states are greater where warfare is more intense.