Before revision: Origin Cross-cultural research entails a particular statistical problem, known as Galton's problem : tests of functional relationships (for example, a test of the hypothesis that societies with pronounced male dominance are more warlike) can be confounded because the samples of cultures are not independent.
After revision: Origin Cross-cultural research entails a particular statistical problem, known as Phylogenetic autocorrelation : tests of functional relationships (for example, a test of the hypothesis that societies with pronounced male dominance are more warlike) can be confounded because the samples of cultures are not independent.