The doctrine that human nature is inherently bad or selfish. A philosophical view used in moral and ethical discussions. Antonym: 'theory of innate goodness' (性善説).
中国哲学の議論で、性悪説と性善説は古くから対立してきた。
In Chinese philosophy, the theories of innate evil and innate goodness have long been opposed.
彼は教育論の中で性悪説に基づいた見解を示した。
He presented a view based on the doctrine of innate evil in his educational theory.