Among them, Moka (Moshi (Mencius)) advocated the ethical doctrine that human nature is fundamentally good, as well as humanity, which was considered the most important type of virtue by Koshi, and the thought of justice, the type of virtue which was considered actionable.
そのなかで孟軻（孟子）は性善説を唱え,孔子が最高の徳目とした仁に加え、実践が可能とされる徳目義の思想を主張した。