Classic philosophies have to be revised because they must be squared up with the many social and intellectual tendencies that have revealed themselves since those philosophies matured. The conquest of the sciences by the experimental method of inquiry; the injection of evolutionary ideas into the study of life and society; the application of the historic method to religions and morals as well as to institutions; the creation of the sciences of “origins” and of the cultural development of mankind--how can such intellectual changes occur and leave philosophy what it was and where it was? Nor can philosophy remain an indifferent spectator of the rise of what may be termed the new individualism in art and letters, with its naturalistic method applied in a religious, almost mystic spirit to what is primitive, obscure, varied, inchoate, and growing in nature and human character. The age of Darwin, Helmholtz, Pasteur, Ibsen, Maeterlinck, Rodin, and Henry James must feel some uneasiness until it has liquidated its philosophic inheritance in current intellectual coin. And to accuse those who are concerned in this transaction of ignorant contempt for the classic past of philosophy is to overlook the inspiration the movement of translation draws from the fact that the history of philosophy has become only too well understood. Any revision of customary notions with its elimination--instead of “solution”--of many traditionary problems cannot hope, however, for any unity save that of tendency and operation. Elaborate and imposing system, the regimenting and uniforming of thoughts, are, at present, evidence that we are assisting at a stage performance in which borrowed--or hired--figures are maneuvering. Tentatively and piecemeal must the reconstruction of our stock notions proceed. As a contribution to such a revision, the present collection of essays is submitted. With one or two exceptions, their order is that of a reversed chronology, the later essays coming first. The facts regarding the conditions of their first appearance are given in connection with each essay. I wish to thank the Editors of the _Philosophical Review_, of _Mind_, of the _Hibbert Journal_, of the _Journal of Philosophy, Psychology, and Scientific Methods_, and of the _Popular Science Monthly_, and the Directors of the Press of Chicago and Columbia Universities, respectively, for permission to reprint such of the essays as appeared originally under their several auspices. JOHN DEWEY COLUMBIA UNIVERSITY, NEW YORK CITY, March 1, 1910. CONTENTS PAGE THE INFLUENCE OF DARWINISM ON PHILOSOPHY 1 NATURE AND ITS GOOD: A CONVERSATION 20 INTELLIGENCE AND MORALS 46 THE EXPERIMENTAL THEORY OF KNOWLEDGE 77 THE INTELLECTUALIST CRITERION FOR TRUTH 112