This essay reads Hobbes’ account of human action against Aristotle’s accounts of animal motion and human action, thus offering a new perspective for understanding Hobbes’ account and illuminating a neglected aspect of Hobbes’ relationship to Aristotle. I argue that the basic structure of Hobbes’ account is indebted to Aristotle’s account of animal motion, except that Hobbes purges the teleological elements from his predecessor and presents a picture that is mechanistic and explicitly deterministic. Moreover, while Aristotle introduces ‘deliberation’ as a way (...) of explaining the diversity of human actions as their varied attempts at realizing the distinctly human end of the good life, Hobbes’ radically anti-Aristotelian notion of ‘deliberation’ explains that diversity in terms of the fundamental uncertainty of the passions. I conclude with some reflections on two related tensions in Hobbes: between Hobbes’ determinism and his account of human action, and between his ethical project of reducing human life to mere life and his separate ethical project of justifying diverse ways of life. This essay contributes to our understanding of the significance of Hobbes’ account of human action in both the history of the debate on determinism and the history of ethics. (shrink)