The homeostatic property cluster theory (HPC) is widely influential for its ability to account for many natural-kind terms in the life sciences. However, the notion of homeostatic mechanism has never been fully explicated. In 2009, Carl Craver interpreted the notion in the sense articulated in discussions on mechanistic explanation and pointed out that the HPC account equipped with such notion invites interest-relativity. In this paper, we analyze two recent refinements on HPC: one that avoids any reference to the causes of the clustering of properties and one that replaces homeostatic mechanisms with causal networks represented by causal graphs. We argue that the former is too slender to account for some inductive inference in science and the latter, thicker account invites interest-relativity, as the original HPC does. This suggests that human interest will be an un-eliminative part of a satisfactory account of natural kindness. We conclude by discussing the implication of interest-relativity to the naturalness, reality, or objectivity of kinds and indicating an overlooked aspect of natural kinds that requires further studies.

稳态特性簇理论（HPC）可以解释生命科学中许多自然种类的术语，因而具有广泛的影响力。但是，体内平衡机制的概念从未被完全阐明。在2009年，卡尔·克雷弗（Carl Craver）解释了有关机械解释的讨论中所表达的概念，并指出配备了这种概念的HPC帐户引起了利益相关性。在本文中，我们分析了HPC的两项最新改进：一种避免提及属性聚类的原因，另一种则用因果图表示的因果网络代替了稳态机制。我们认为，前者太苗条，无法解释科学中的一些归纳推理，而后者，就像原始的HPC一样，更广泛的解释会引起利益相关性。这表明人类的兴趣将是对自然善良的令人满意的解释的重要部分。最后，我们讨论了利益相关性对物种的自然性，现实性或客观性的含意，并指出了需要进一步研究的自然物种被忽视的方面。