George Santayana’s Idealistic Naturalism and Its Criticisms

Abstract

This article examines George Santayana’s philosophical naturalism and the criticisms directed against it by John Dewey and Roy Wood Sellars. It argues that Santayana cannot be reduced either to a strict materialist or to an idealist thinker, because his system is built on the coexistence of matter, essence, truth, and spirit within a single natural order. The study first explains Santayana’s concept of animal faith as the primordial, non-rational basis of all knowledge and action. On this account, belief is not grounded in proof but in the biological conditions of life, practical need, and instinctive adaptation to the world. The article then shows how Santayana’s four realms structure his ontology: matter as the ground of existence, essence as the field of intelligible forms, truth as the factual description of what has occurred, and spirit as the light of consciousness emerging from organic life. Within this framework, spirit remains dependent on matter while still making possible meaning, value, and reflective awareness. The second part of the article focuses on the major objections raised by Dewey and Sellars. Dewey accuses Santayana of introducing a dualism between material nature and timeless essences, thereby weakening naturalism. Sellars, by contrast, criticizes Santayana’s epiphenomenalism and the claim that consciousness is merely passive. The article argues, however, that these criticisms overlook the consistency of Santayana’s own naturalism, which refuses both crude reductionism and supernatural explanation. Santayana’s use of idealist vocabulary does not abandon nature; rather, it seeks to account for the emergence of meaning, consciousness, and value within nature itself. In this sense, Santayana’s philosophy offers a distinctive alternative to both materialist reduction and transcendental idealism. Ultimately, the article suggests that Santayana’s naturalism is best understood as a middle path: fully rooted in matter, yet broad enough to preserve human meaning, aesthetic experience, and crucial philosophical reflection.