"Our language probably emerged to simplify the formation and improve the efficiency of coalitions and alliances," says Gavrilets. The scientists caution that one should be careful in applying their model to contemporary humans (whether members of modern societies or hunter-gathers). In contemporary humans, an individual's decision to join coalitions is strongly affected by his/her estimates of costs, benefits, and risks associated as well as by cultural beliefs and traditions. These are the factors explicitly left outside of the modeling framework.
In humans, a secondary transition from egalitarian societies to hierarchical states took place as the first civilizations were emerging. How can it be understood in terms of the model discussed? One can speculate that technological and cultural advances made the coalition size much less important in controlling the outcome of a conflict than the individuals' ability to directly control and use resources (e.g. weapons, information, food) that strongly influence the outcomes of conflicts.
|Contact: Sergey Gavrilets|
Public Library of Science