> [Nakagawa, Yoichiro](nakagawa.md). "A Human-animal Organization as the Basis for Georges Dumézil’s Trifunctional Theory: Three-Tiered Shepherd-Dogs-Sheep Hierarchy in the Herding Organization of the Proto-Indo-Europeans in the Myth Formation Period (4th Millennium BC)". Keizaigaku-Ronsan (The Journal of Economics, Chuo University), 61(5-6) 209-246, Mar 25, 2021. > [researchmap.jp](https://researchmap.jp/read0026230/published_papers/32050496)  ## Contents Introduction ― Georges Dumézil’s trifunctional theory and his theoretical alteration in 1950 Ⅰ Criticisms of the trifunctional theory Ⅱ The Setback in 1950 of Trifunctional theory Ⅲ The  three-tiered class structure in the early nomadic organization as the basis of Trifunctional ideology Conclusion ― The setback of trifunctional theory in a double meaning