Adaptive Enemies

This chapter draws on key concepts from evolutionary theory, anthropology, and social science to explore how adaptive enemies evolve and adapt under conditions of conflict. It identifies four key mechanisms of evolution in irregular warfare—social learning, natural selection, artificial selection (including both unconscious artificial selection and predator effects), and institutional adaptation—and gives examples of each. It also examines forms of conscious military innovation by states, and draws a distinction between peacetime (concept led) and wartime (reactive) modes of innovation. The chapter argues that domination of the operational environment by Western armed forces since the end of the Cold War has created evolutionary pressure to which all adversaries—state and non-state—have responded, and that this response is shaping new approaches to war.