One culture may operate mostly on stage 2 reasoning, another on stage 4 reasoning. But his does not mean that the patterns of moral thought are quite different in the two-cultures. Rather, the discrepancies result because the children in one society advance up the six-stage hierarchy at a different rate than children in the other society. The differences in rate might be due partially to genetic differences between the two groups but more likely result from differences in the role-tasking opportunities and justice structures of the two cultures.