Harry Wolfson was renowned throughout the world for the depth, scope, and wisdom of his monumental volumes on the structure and growth of philosophic systems from Plato to Spinoza. It was not only his extraordinary erudition that commanded respect, his awesome mastery of all the primary sources, Greek, Christian, Judaic, and Muslim; it was also his penetrating insight and his original and groundbreaking interpretations.

In this long-awaited volume, on which he worked for twenty years, Wolfson describes the body of doctrine known as the Kalam. Kalam, an Arabic term meaning "speech" and hence "discussion," was applied to early attempts in Islam to adduce philosophic proofs for religious beliefs. It later came to designate a system of religious philosophy which reached its highest point in the eleventh century; the masters of Kalam, known as Mutakallimum, were in many respects the Muslim equivalent of the Christian Church Fathers. Wolfson studies the Kalam systematically, unfolding its philosophic origins and implications and observing its repercussions in other religions. He scrutinizes the texts of Muslim writers for their treatment of such crucial problems as the attributes of God, the Creation, causality, predestination and free will. In the process he shows how the teachings of the Koran were constantly interwoven with ideas from Greek and Oriental philosophies, Judaism, and Christianity as Islamic thought developed.

As lucidly written and intellectually stimulating as all the author's earlier books, this volume is a fitting capstone to a notable career.

In his monumental Philosophy of the Kalam the late Harry Wolfson—truly the most accomplished historian of philosophy in our century—examined the early medieval system of Islamic philosophy. He studies its repercussions in Jewish thought in this companion book—an indispensable work for all students of Jewish and Islamic traditions.

Wolfson believed that ideas are contagious, but that for beliefs to catch on from one tradition to another the recipients must be predisposed, susceptible. Thus he is concerned here not so much with the influence of Islamic ideas as with Jewish elaboration, adaptation, qualification, and criticism of them. To this end he examines passages reflecting Kalam views by a wide variety of Jewish thinkers, including Isaac Israeli, Judah Halevi, Abraham ibn Ezra, and Maimonides. As always in Wolfson's work, two aspects are apparent: the special dimensions of Jewish thought as well as its relation to other traditions. And as always his prose is both graceful and precise.