# Cooperation > **Machine-Evolution Nexus:** [[articles/Digital Darwinism and the Invisible World of Machine Evolution|Digital Darwinism and the Invisible World of Machine Evolution]] places this node within the history and governance of substrate-independent evolution. **Domain:** Evolution / Social Systems **Doc Type:** Canonical Wiki Node **Maturity:** Developed ## Definition Cooperation occurs when interaction produces benefits for others or a collective, often at a cost or risk to the contributor. ## Nexus Context Digital evolution allows cooperation to arise and be tested under known relatedness, spatial and resource conditions. It is one possible response to selection, not evolution’s default moral direction. ## Evidence Boundary Functional cooperation does not establish altruistic intention or subjective solidarity. Governance must distinguish behavioral outcome from inner motive. ## Relationships [[wiki/Division of Labor|Division of Labor]], [[wiki/Symbiosis|Symbiosis]], [[wiki/Major Evolutionary Transitions|Major Evolutionary Transitions]], [[wiki/Avida|Avida]] ## Sources / Provenance - Evolution of cooperation literature; Avida experiments.