We all know that being reasonable is important in daily life. Beyond daily life, major political and ethical theorists give central place to reasonableness in their accounts of just and moral behaviour. In the law, at least in the Anglo-American setting, reasonableness is the standard for a wide range of behaviour, from administrative decisions to torts. But what is it to be reasonable? In answer, I provide a genealogical account of reasonableness. The functional perspective afforded by a genealogical account has numerous payoffs, explaining important features of reasonableness, and enabling us to respond to worries about vagueness or subjectivity in the meaning of ‘reasonable’.

中文翻译：

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合理性的谱系

我们都知道，理性在日常生活中很重要。除了日常生活之外，主要的政治和伦理理论家在他们对正义和道德行为的描述中将合理性放在了中心位置。在法律中，至少在英美环境中，合理性是从行政决定到侵权行为的广泛行为的标准。但是什么是合理的呢？作为回答，我提供了一个关于合理性的家谱说明。家谱描述所提供的功能视角有许多好处，解释了合理性的重要特征，并使我们能够回应对“合理”含义的模糊性或主观性的担忧。