History of Philosophy and History of Ideas PAUL OSKAR KRISTELLER THE TF.~MS "history of philosophy" and "history of ideas" are frequently associated in current public and professional discussions, and many statements seem to suggest that the two terms are more or less synonymous, or that the former term, being old-fashioned, might well be replaced with the latter which for many ears appears to have a more fashionable and glamorous ring. Hence there arises the question what each of these terms really means, or what it should mean, and whether and to what extent it is justifiable to identify them with each other, to reduce the history of philosophy to the history of ideas, or to treat the former as a part or subdivision of the latter. I am not convinced that these questions can be answered through an appeal to ordinary usage since this usage is fluid and reflects at best the intellectual formulations and decisions of a remote or recent past. We may have reason to question the very validity of these decisions, and perhaps to suggest or make different decisions, and in case we are successful and obtain a reasonable amount of approval, these different decisions will be reflected in the ordinary usage of tomorrow, though not yet in that of today. The attempt to discuss the meaning and relationship of the history of philosophy and the history of ideas is obviously difficult and hazardous. It involves not only the discussion of such complicated notions as history and philosophy (and idea), but also the shifting balance of the intellectual globe that includes the continents or territories denoted by those terms, and even of the academic globe that purports to be, with varying success, its faithful image. In a short paper, I cannot hope to present an original or adequate discussion of these difficult problems, but merely try to raise a few questions which to my knowledge have not received sufficient attention and may be of interest to philosophers and historians. The history of philosophy has been of recurrent interest to philosophers and other scholars, especially in classical antiquity and again in the Renaissance period. It came to occupy a central place in European thought during the last century, especially in the wake of German idealism. Hegel recognized "history" as a major area of reality and of philosophical concern, as Vico and Herder had done before him, and thus left a living heritage not only to his followers down to Croce and Gentile, but also to Marx and his [1] 2 HISTORY OF PHILOSOPHY disciples, and to many other thinkers who cannot be called Hegelians. Hegel also did not conceive political history in isolation, but in his phenomenology and philosophy of the spirit came close to a concept of culture or civilization in which political and social institutions, religion and the arts, the sciences and philosophy are interrelated as manifestations of the same spirit and subject to the same "dialectical" laws of historical development. The vast progress which the historical disciplines made during the nineteenth and early twentieth centuries, not only in the field of political and economic history but in the history of languages and literatures, of the arts and religions , and of civilization in general was not influenced by Hegel's theories, but rather opposed to them. Yet this vast body of knowledge and of learning imposed itself as an epistemological problem to such thinkers as Dilthey, Rickert, and Cassirer. Finally, Hegel considered philosophical thought itself as dialectical, that is, in a certain sense as historical, and thus foreshadowed not only Mannheim's sociology of knowledge, or Croce's claim that philosophy and history are identical, but also Heidegger's conception of historicity as a basic aspect or dimension of human thought and being. Within such a framework, the history of philosophy occupies a significant and even a central position for the philosopher since it elucidates the basic stages through which philosophical thinking passed before it reached its present situation. Any attempt to grasp or answer our present philosophical prob- ]ems thus presupposes at least a general understanding of the historical developments which have prepared or produced these problems. In the English-speaking world, both...