Passmore provides, in this book, the philosophical context, such as British Idealism, and the origins and development of, modern Analytic Philosophy. He also touches on the rise of Existentialism and Phenomenology. His endnotes include extensive bibliographic references to books and articles published in reaction and discussion during this period. A Hundred Years of Philosophy is not an introduction to philosophy, written to acquaint a novice with the concerns and methods of philosophy. Passmore assumes the reader has done some reading in philosophy and knows something of the background, such as Descartes’ Rationalism, the Empiricism of Hume, Berkeley’s Idealism, Kant’s Critical Philosophy, and the rudiments of Mathematical Logic.