This work investigates the core question of how George Berkeley’s radical immaterialism functions as a coherent philosophical system rather than a series of isolated paradoxes. Kenneth P. Winkler, a scholar of early modern philosophy, utilizes a rigorous analytical framework to re-examine Berkeley’s primary texts. He argues that Berkeley’s denial of material substance is a logical extension of his reflections on abstraction, representation, and causality. By situating Berkeley within the context of his contemporaries, Winkler provides a systematic reconstruction of the philosopher's arguments regarding the nature of spirits and the external world.

Scholars frequently cite this text as a definitive, high-level interpretation of Berkeley’s metaphysical project. It is widely regarded as an essential resource for advanced students and researchers navigating the complexities of early modern empiricism.