Academic Skepticism in Hume and Kant: A Ciceronian Critique of Metaphysics by Catalina González Quintero (review)

Reviewed by: Academic Skepticism in Hume and Kant: A Ciceronian Critique of Metaphysics by Catalina González Quintero Zuzana Parusniková Catalina González Quintero. Academic Skepticism in Hume and Kant: A Ciceronian Critique of Metaphysics. Cham: Springer, 2022. Pp. 268. Hardcover. ISBN: 978-3-030-89749-9. £99.99. This book is a valuable contribution to the rapidly expanding field of research into the formative impact of ancient skepticism on early modern philosophy. This new paradigm was introduced several decades ago, as González Quintero acknowledges, by the pioneering work of Richard Popkin; and while Popkin emphasized the constitutive role of Pyrrhonism in this process, recent philosophical debates have been characterized by a more measured approach, carefully differentiating between the Academics and the Pyrrhonists, and their respective influence on modern skeptics. Gonzáles Quintero opts for the Academic interpretation of Hume’s skepticism, applying it to both his Treatise and the first Enquiry, and extending it to both of Kant’s Critiques—an area much less explored in the context of ancient skepticism. She thus heads into a complex philosophical landscape. The reader may be somewhat puzzled by the book’s subtitle, one which seems to add yet another theme to its already broad structure. However, as Gonzáles Quintero explains in the Introduction, she wants to take the discussions of Academic skepticism beyond the field of empirical science and concentrate on the attitude of the skeptics towards metaphysics; her aim is to show how Cicero, Hume, and Kant “used skeptical means to examine the justification of metaphysical claims and to determine, in this way, which resulting beliefs could be held non-dogmatically and for practical purposes” (1). Perhaps then, the book may be more accurately titled Academic Skepticism and Metaphysics: Cicero, Hume and Kant. Though this may seem a reduction in the scope of the topics, in this particular case it is an expansion, since the author reconstructs how the attitude of the skeptics to metaphysics unfolds from their general epistemological skepticism concerning the limits of reason. She divides the book into three main parts (Cicero, Hume, and Kant), with the first chapter of each part describing the skeptical method of that particular philosopher or school, and the second examining its application to metaphysical matters. This is a huge undertaking for one book, requiring the author to navigate a vast field of philosophical material, including a significant amount of primary and secondary literature, while turning it all back toward the main question concerning the role played by Academic (Carneadean) skepticism in the ancient, Humean, and Kantian treatments of religion and other metaphysical issues. The danger of topic-overload arises and a selective approach is crucial to avoid “dropping the ball.” Gonzáles Quintero tackles this task with varying success. [End Page 346] The first chapter of the first part of the book provides a thorough analysis of Academic skepticism and how it differs from Pyrrhonism and stoicism. With an extensive knowledge of scholarly debates on ancient skepticism, the author discusses various nuances in the relationship between radical Pyrrhonism and Arciselaus of the Second Academy, moving on, predictably, to Carneades of the Third Academy, who proposed a moderate version of skepticism based on evaluating the degree of persuasiveness of impressions. Such impressions deserve non-dogmatic approval and can thus reduce the scope of epoché; they motivate our search for truth while admitting our fallibility; and they guide us in practical matters. Her argument that assenting to persuasive beliefs contains a rational (normative) aspect perhaps deserves further discussion; for the ancient skeptics the criterion of persuasiveness was subjective and unstable, reflecting our momentary feelings about appearances. In the chapter on metaphysics, the author compares Cicero’s skeptical method in De Natura Deorum (DND) and the Tusculan Disputations. In the former, Cicero (through the character of Cotta) abandons skeptical principles (which would prevent us from defining the nature of the gods) for the sake of the practical usefulness of religious rituals as endorsed by the Stoics; while for the Epicureans (Velleius) the gods (or some cosmic Deity) are utterly unconcerned by our world, for the Stoics (Balbus) they care about human affairs—thus this latter stance supports the state religion that Cicero...