Summary and Keywords
The application of evolutionary theories or models to explain political decision making is quickly maturing, fundamentally interdisciplinary, and irreducibly complex. This hybridization has yielded significant benefits, including real progress toward understanding the conditions under which cooperation is possible, and a clearer understanding of the apparently “irrational” drivers of political violence.
Decision making requires a nervous system that conditions motivation and behavior upon adaptively relevant cues in the environment. Such systems do not exist because they maximize utility, enlightenment, or scientific truth; they exist because on average they led to outcomes that were reproductively beneficial in ancestral environments. The reproductive challenges faced by our ancestors included not only ecological problems of predator avoidance but also political problems such as inter-group threat and the distribution of resources within groups. Therefore, evolutionary approaches to political decision making require direct and deep engagement of the logic whereby natural selection builds adaptations. This view of human psychology yields valuable insights on the domain specificity of political decision making as well as the psychological consequences of mismatch between modern and ancestral environments. In other words, there is accumulating evidence that many of the complex adaptations of the human brain were designed to solve the many problems of ancestral politics.
This discussion begins by distinguishing evolutionary approaches from other frameworks used to explain political decision making, such as rational choice, or realism in international relations. Since evolutionary models of political decision making have now produced decades of original theoretical and empirical contributions, we are in a useful position to take stock of this research landscape. Doing so crystalizes the promises, perils, and scope of evolutionary approaches to politics.
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