Social learning strategies

Social learning strategies are the decision rules that determine when individuals copy others, who they copy, and when they rely on individual exploration instead. In Dual Inheritance Theory, these strategies are treated as evolved psychological mechanisms shaped by natural selection to optimize the trade-off between the cost of individual learning (trial and error is dangerous and slow) and the risk of social learning (copying others can propagate maladaptive or outdated behaviors).

Peter Richerson and Robert Boyd identified several core strategies: copy when individual learning is costly, copy when the environment is stable enough that others' solutions remain relevant, copy the majority (conformist bias), and copy the successful (prestige bias). These strategies are not conscious calculations. They are heuristic biases that operate automatically and that vary in their adaptive value depending on ecological and social context. The study of social learning strategies bridges cultural evolution, behavioral ecology, and cognitive science — asking not just what humans learn but how they decide what is worth learning.