To define the scope of Jewish history, its content and its significance, or its place among scientific pursuits, disposes only of the formal part of the task we have set ourselves. The central problem is to unfold the meaning of Jewish history, to discover the principle toward which its diversified phenomena converge, to state the universal laws and philosophic inferences deducible from the peculiar course of its events. If we liken history to an organic being, then the skeleton of facts is its body, and the soul is the spiritual bond that unites the facts into a whole, that conveys the meaning, the psychologic essence, of the facts. It becomes our duty, then, to unbare the soul of Jewish history, or, in scientific parlance, to construct, on the basis of the facts, the synthesis of the whole of Jewish national life. To this end, we must pass in review, by periods and epochs, one after another, the most important groups of historical events, the most noteworthy currents in life and thought that tell of the stages in the development of Jewry and of Judaism. Exhaustive treatment of the philosophical synthesis of a history extending over three thousand years is possible only in a voluminous work. In an essay like the present it can merely be sketched in large outline, or painted in miniature. We cannot expect to do more than state a series of general principles substantiated by the most fundamental arguments. Complete demonstration of each of the principles must be sought in the annals that recount the events of Jewish history in detail. The historical synthesis reduces itself, then, to uncovering the psychologic processes of national development. The object before us to be studied is the national spirit undergoing continuous evolution during thousands of years. Our task is to arrive at the laws underlying this growth. We shall reach our goal by imitating the procedure of the geologist, who divides the mass of the earth into its several strata or formations. In Jewish history there may be distinguished three chief stratifications answering to its first three periods, the Biblical period, the period of the Second Temple, and the Talmudic period. The later periods are nothing more than these same formations combined in various ways, with now and then the addition of new strata. Of the composite periods there are four, which arrange themselves either according to hegemonies, the countries in which at given times lay the centre of gravity of the scattered Jewish people, or according to the intellectual currents there predominant. This, then, is our scheme: I. The chief formations: a) The primary or Biblical period. b) The secondary or spiritual-political period (the period of the Second Temple, 538 B. C. E. to 70 C.E.) c) The tertiary or national-religious period (the Talmudic period, 70-500).