Fig. 3: The decomposition of the average PC2 into two subsets of CCs.
From: Scale and information-processing thresholds in Holocene social evolution
The red line represents the CC components related to information-processing capabilities (writing, money, texts, infrastructure, and gvrnmt in order of importance), having positive correlations with PC2. The blue line represents the CC components primarily related to scale (PolPop, levels, CapPop, and PolTerr in order of importance). Note the changes in gradients along these two lines as they traverse PC1. The black line here is identical to the blue line in Fig. 2, with a change of scale.
