George Berkeley (16851753) was an Irish philosopher best known for the advancement of a theory he called "immaterialism." He wrote A Treatise Concerning the Principles of Human Knowledge in 1710.
Roger Woolhouse was educated at Dents School, Saltburn, and University College London. He has taught at University College Cardiff, the University of Pennsylvania and Princeton University, and is presently professor of philosophy at the University of York and visiting professor at Rutgers University. He is the author of Lockes Philosophy of Science and Knowledge, Locke, The Empiricists, and Descartes, Spinoza, Leibniz. He has also edited Goerge Berkeleys Principles of Human Knowledge and Three Dialogues Between Hylas and Philonous for Penguin Classics.