There is, however, one important and historical fact which makes more definite, and more feasible, the attempt to present in outline the history of the philosophical development of the nineteenth century. This fact is the death of Immanuel Kant, February 12, 1804. In a very unusual way this event marks the close of the development of philosophy in the eighteenth century. In a yet more unusual way the same event defines the beginning of the philosophical development of the nineteenth century. The proposal is, therefore, not artificial, but in accordance with the truth of history, if we consider the problems, movements, results, and present condition of this development, so far as the fulfillment of our general purpose is concerned, in the light of the critical philosophy of Kant. This purpose may then be further defined in the following way: to trace the history of the evolution of critical and reflective thought over the more ultimate problems of Nature and of human life, in the Western World during the last hundred years, and from the standpoint of the conclusions, both negative and positive, which are best embodied in the works of the philosopher of Königsberg. This purpose we shall try to fulfill in these four divisions of our theme: (1) A statement of the problems of philosophy as they were given over to the nineteenth century by the Kantian Critique; (2) a brief description of the lines of movement along which the attempts at the improved solution of these problems have proceeded, and of the principal influences contributing to these attempts; (3) a summary of the principal results of these movements--the items, so to say, of progress in philosophy which may be credited to the last century; and finally, (4) a survey of the present state of these problems as they are now to be handed down by the nineteenth to the twentieth century. Truly an immensely difficult, if not an impossible task, is involved in this purpose!