Evolutionary arms race

An evolutionary arms race is a co-evolutionary dynamic in which two or more systems are locked in reciprocal escalation, each adaptation in one system triggering a counter-adaptation in the other. The classic biological example is the co-evolution of predator and prey, where faster prey select for faster predators and vice versa, producing ever-increasing investment in speed, toxicity, or deception with no terminal equilibrium.\n\nThe arms race dynamic is not confined to biology. It appears in cybersecurity, where exploits and defenses co-evolve in escalating complexity; in antibiotic resistance, where pharmaceutical innovation and microbial adaptation are locked in a Red Queen treadmill; and in platform competition, where feature duplication and user-acquisition tactics escalate until all competitors converge on indistinguishable offerings. The arms race is the pathological form of co-evolution — the case where mutual adaptation becomes mutual entrapment.\n\n\n

The arms race dynamic is self-reinforcing because each side's investment in escalation is rational at the local level even as it becomes collectively destructive. This is a form of Runaway optimization that no participant can unilaterally stop.