Unearth a pivotal, little-known chapter in the history of idealism. This edition surveys Arthur Collier’s Clavis Universalis, a compact 18th‑century work that influenced later debates about the external world and perception. It traces how the book circulated, drew attention from scholars in Britain and Germany, and shaped discussions alongside later metaphysical tracts.

The description covers the book’s reception, the people who helped revive interest, and the way Collier’s ideas were read through later abstracts and translations. It also situates Collier among his contemporaries and explains why his Visions of a universal key remain a touchstone for discussions of mind, reality, and the limits of perception.

Origins, editions, and the revival of interest over two centuries

Core arguments about external existence, perception, and the nature of matter

Connections to Berkeley and other philosophers, plus historical translations

Context within a broader history of metaphysical thought

Ideal for readers curious about the roots of idealism, the history of philosophy of mind, and the archival trail of 18th‑century thought.

"About this title" may belong to another edition of this title.

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