1st Edition

About Haecceity An Essay in Ontology

By Matthew Davidson Copyright 2024
    154 Pages 1 B/W Illustrations
    by Routledge

    This book offers an in-depth and updated examination of the nature of haecceity—that primitive entity which explains why something is distinct from other things.

    The book begins by exploring different conceptions of haecceity throughout history. The discussion of various figures across history is important for getting clear on the nature of haecceity and its role in individuation. The next part of the book examines different views about the nature of haecceity. The author defends a view on which haecceities have objects that instantiate them as constituents. Following that, the book considers arguments for and against the existence of haecceities, the epistemology of haecceity, and the distinction between qualitative and non-qualitative properties.

    About Haecceity will appeal to scholars and advanced students working in metaphysics, philosophy of language, epistemology, logic, and history of philosophy.


    1. Preliminaries: Haecceity Through History

    2. The Nature of Haecceity

    3. Haecceity: Arguments for and Against

    4. Qualitative and Quidditative Properties 

    5. Haecceity and Existence

    6. Haecceity and Acquaintance

    7. Haecceity Applied: Thisness Presentism



    Matthew Davidson is Professor and Chair of Philosophy at California State University, San Bernardino. He works in metaphysics, philosophy of religion, and philosophy of language. His recent publications include The Metaphysics of Existence and Nonexistence and Knowledge and Reality in Nine Questions.