PREFACE IN the following pages I have confined myself in the main to those problems of philosophy in regard to which I thought it possible to say something positive and constructive, since merely negative criticism seemed out of place. For this reason, theory of knowledge occupies a larger space than metaphysics in the present volume, and some topics much discussed by philosophers are treated very briefly, if at all. I have derived valuable assistance from unpublished writings of G. E. Moore and J. M. Keynes: from the former, as regards the relations of sense-data to physical objects, and from the latter as regards probability and induction. I have also profited greatly by the criticisms and suggestions of Professor Gilbert Murray. 1912...
WHY MEN FIGHT I THE PRINCIPLE OF GROWTH TO all who are capable of new impressions and fresh thought, some modification of former beliefs and hopes has been brought by the war. What the modification has been has depended, in each case, upon character and circumstance; but in one form or another it has been almost universal. To me, the chief thing to be learned through the war has been a certain view of the springs of human action, what they are, and what we may legitimately hope that they will become. This view, if it is true, seems to afford a basis for political philosophy more capable of standing erect in a time of crisis than the philosophy of traditional Liberalism has shown itself to be. The following lectures, though only one of them will deal with war, all are inspired by a view of the springs of action which has been suggested by the war. And all of them are informed by the hope of seeing such political institutions established in Europe as shall ma...