伦理学这门学科首次在亚里士多德的《尼各马克伦理学》中独立成型、而在康德的《实践理性批判》中才获得了完全的独立性。以G·E·摩尔的《伦理学原理》为标志 ,元伦理学思潮兴起。元伦理学家们通过对道德语言的逻辑分析对伦理学的性质提出了一些新的看法。首先 ,他们都反对传统规范伦理学 ,认为传统规范伦理学无法逃脱“自然主义的谬误” ;其次 ,在关于伦理学是否一门科学的问题上 ,直觉主义持肯定态度 ,而情感主义则反之。黑尔分析了道德判断中的祈使部分和陈述部分 ,提出了他的普遍规定主义主张 ,预示着元伦理学在反省自身之逻辑基础之后向规范伦理学回归的倾向。维特根斯坦则严守语言所能言说的界限 ,而将伦理学的问题归于神秘领域 The discipline of ethics, for the first time in Aristotle’s “Nicodemus Ethics” independently formed, but in Kant’s “Critique of Practical Reason” was completely independent. With GE Moore’s “Ethics Principles” as a sign, the trend of meta-ethics has arisen. Yuan ethicists put forward some new ideas about the nature of ethics through the logical analysis of moral language. First, they opposed traditional normative ethics, arguing that traditional normative ethics could not escape the fallacy of naturalism; secondly, intuitionism was affirmative on the question of whether ethics was a science or vice versa. Hale analyzed the imperative part and the statement part in moral judgment, put forward his universal prescriptive assertion, and foreshadowed the propensity of meta-ethics to return to normative ethics after reflecting on its own logical foundation. Wittgenstein is strict with the boundaries of the language can be said, and the ethics of the problem to the mysterious area