Economic Environments and Social Inequality

Key Insight

The degree of egalitarianism or exploitation in social relationships, including gender dynamics, is primarily determined by two environmental factors: mutual dependence and exit strategy. Mutual dependence refers to how much group members rely on each other for survival; higher dependence fosters more egalitarian treatment. Exit strategy defines the ease with which weaker individuals can leave exploitative relationships; greater difficulty in leaving or less need for cooperation leads to more hierarchical social structures.

These factors are clearly illustrated by our closest relatives, chimpanzees and bonobos, despite their close genetic kinship. Chimpanzees, living north of the Zaire River in resource-scarce environments with gorillas, exhibit hierarchical, xenophobic, and male-dominant societies. Food is difficult to acquire, mutual dependence is low, and exit options are costly due to territorial aggression. This results in high-ranking males monopolizing matings and even infanticide to shorten female interbirth intervals.

Bonobos, in contrast, thrive south of the Zaire in a gorilla-free, resource-rich environment. Their abundance of ground vegetation allows for easy foraging and strong mutual dependence, fostering extreme social and sexual egalitarianism. Bonobos employ a 'sex for peace' approach, resolving conflicts through diverse sexual acts rather than violence, and have never been observed to engage in warfare. These stark differences highlight how specific economic environments profoundly shape social and political behaviors, directly impacting gender relations and group dynamics.