Explaining intergroup cultural variation requires analysis at two coupled levels

Evidence

At a cultural evolutionary level, we want to know how beliefs and values are transmitted among individuals, and why this process generates and maintains differences among groups. 2. At the genetic evolutionary level, we want to understand the conditions under which natural selection could favor the psychological mechanisms posited to explain the cultural evolution of groups. — Joe Henrich and Robert Boyd, The Evolution of Conformist…, 12

Categorization

• DEFINE: Establishes the paper’s dual-level explanatory framework separating cultural-transmission dynamics from genetic-selection dynamics.
• XREF: connects to: Cultural variation between groups requires an adaptive explanation consistent with evolved psychology. — Joe Henrich and Robert Boyd, The Evolution of Conformist…, 8; Intergroup comparisons operate within nested levels of more inclusive group identities — John T. Jost and Jim Sidanius, Political Psychology, 4414; Ecology cannot explain divergent cultural traits among neighboring Amazonian groups — Joe Henrich and Robert Boyd, The Evolution of Conformist…, 110

Broader Connections

• Intergroup comparisons operate within nested levels of more inclusive group identities #exemplifies (0.72) — John T. Jost and Jim Sidanius, Political Psychology, 4414