Then, shi-no-ko-sho became an important concept in history, which created the common idea that there had been the order 'shi-no-ko-sho-eta-hinin (non-people)' by adding eta and hinin to shi-no-ko-sho.
そして士農工商は歴史学上の重要概念となり、さらに士農工商の下に穢多（えた）や非人（ひにん）を付けて「士農工商穢多非人」という序列があったとする俗説も生まれた。