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Argues that many philosophical commitments to hidden "essences" are based on misunderstandings of language, and that Wittgenstein's view of meaning as use dissolves these essentialist assumptions across logic, epistemology, and metaphysics.
What if much of contemporary philosophy rests on a mistake about language?
In Essentialism, Garth L. Hallett mounts a sustained and wide-ranging challenge to the assumption that things in the world must share hidden "essences" in order for our concepts to meaningfully apply. Drawing on Ludwig Wittgenstein's insights into language, use, and meaning, Hallett argues that much of modern essentialist thinking stems not from discovery, but from a misunderstanding of how language actually works.
Across seven tightly argued chapters, the book traces the rise, persistence, and transformation of essentialist thought—from classical and medieval analogies to contemporary debates in epistemology, philosophy of language, and modal metaphysics. Figures such as Kripke, Gettier, Dretske, and Carnap are engaged critically, alongside broader patterns in philosophical reasoning that continue to reintroduce essentialist assumptions under new forms.
Hallett not only diagnoses these recurring confusions but also asks why they remain so resilient. His answer is both philosophical and therapeutic: the problem is not simply that essentialism is false, but that certain entrenched habits of thought make it feel unavoidable.
Engaging, methodical, and philosophically provocative, this work challenges readers to reconsider what it means for concepts to have boundaries—and whether those boundaries were ever as fixed as philosophy has long assumed.
"This book develops Wittgenstein's account of language, and uses it to criticize a number of current philosophers and their writings. Wittgenstein argued that the act of our using a single expression to label a number of different things is no evidence that these things possess a single essence. Hallett identifies a number of current essentialists, and argues that they have simply misunderstood the workings of language. He provides an explanation why philosophers persist in this mistake, and proposes therapies to get philosophers to stop making it." — John T. Kearns, State University of New York at Buffalo
"This book is valuable for its willingness to confront the comprehensive presence of essentialism in contemporary philosophical thought, and to confront it from an intelligent and discriminating Wittgensteinian perspective." — James C. Edwards, Furman University
Garth L. Hallett, S. J. , is Dean of the College of Philosophy and Letters at St. Louis University. He is the author of Wittgenstein's Definition of Meaning as Use; Darkness and Light: The Analysis of Doctrinal Statements; A Companion to Wittgenstein's "Philosophical Investigations;" Christian Moral Reasoning: An Analytic Guide; Logic for the Labyrinth: A Guide to Critical Thinking; Reason and Right; Language and Truth; and Christian Neighbor-Love: An Assessment of Six Rival Versions.
Acknowledgments
Introduction
1. The Decline of Explicit Essentialism
A Theoretical Sampling
Wittgenstein's Critique
Carnapian "Explication"
Essences and "Rigid Designators"
Variations
Summary Reflections
2. The Persistence of Essentialistic Theorizing
Cajetan on Analogy
Wittgenstein on Language and Propositions
Williams on Knowledge
Dretske on Knowledge
Overview
3. Calculus and Mosaic
Meaning and Use
Second Series
Samples from the Other Side
Signs of Something Larger
4. Network-Reasoning
A Problematic Paradigm
Language as an Interlocking Calculus
An Alternate Line of Critique
One-Directional Reasoning
Back to the Beginning
5. Other Worlds
Real Concepts, Unreal Worlds
A Systematic Sampling
Gettier's Counter-Examples
Robot Cats, Sleek Toads, Etc.
Cartesian Selves, Bracketed Worlds
Kripke and Possible Worlds
Retrospect
6. Sources of Essentialism
A First Source: Language
A Second Source: Disregard for Language
A Third Source: The Will
A Fourth Source: Contagion
A Fifth Source: Argument
Alternatives
7. Diagnoses and Prognosis
General Theories: Scheler
Particular Theories: Wittgenstein
Calculus-Reasoning: Pitcher
Network-Reasoning: Graham
Other-Worlds Reasoning: Kripke
Overview
Notes
Works Cited
Index