善是伦理学研究的核心概念。摩尔开创了元伦理学的先河,从语言上对“什么是善”作出了不可定义的分析。斯蒂文森从语词的情感意义上对善作出了进一步的讨论。但是只是从人的“直觉”或“主观情感”上来对善进行语言分析,难免会走向道德上的历史虚无主义和主观相对主义。要想摆脱这种困境,我们必须对善这个概念从存在论基础上作出解释。 Good is the core concept of ethics research. Moore created the precedent of meta-ethics and made an indefinable analysis from the language of “what is good”. Stevenson further discusses goodness in the emotional sense of words. However, just analyzing the language of human beings from “intuition” or “subjective feelings” will inevitably lead to moral historical nihilism and subjective relativism. To get out of this dilemma, we must explain the concept of good from the ontological basis.