This study argues that the exploration of Hegel and Spinoza’s philosophies of material Nature yields a more compelling critique of Spinoza’s thought than either Hegel himself or commentators have recognised. Rather than attempting a full comparison of Hegel and Spinoza’s accounts of material Nature, this study focuses on elaborating a critique of the deficiencies found, from a Hegelian standpoint, in Spinoza’s account of extended Nature. This study argues that the Hegelian critique of Spinoza’s theory of extended Nature takes at least (...) two major interrelated forms. Firstly, this critique suggests that Spinoza does not adequately derive the necessity of Substance’s existence as Extension, as motion and rest, and as finite bodies. This is demonstrated in this study through an account of Hegel’s immanent development of Nature as such and its mechanical forms from the conclusion of the Science of Logic. Secondly, this critique suggests that Spinoza’s mechanical and quantitative conception of the broader picture of material Nature is inadequate. This is demonstrated through an account of Hegel’s critique of any purely mechanical conception of the natural world, arguing instead that Nature is necessarily driven through a series of qualitatively different stages including the chemical and organic. This study makes an original scholarly contribution through its investigation of the Hegel-Spinoza relationship in the specific context of their philosophies of material Nature, an aspect of this relationship previously unexplored. This study thereby makes the first step in the expansion of the scholarship of the Hegel-Spinoza relationship into this new area, opening a promising new avenue for future work on these great philosophers. (shrink)