A collection of fourteen essays in which Professor Postan draws together for the first time his contributions to the debate on historical method, and discusses from a variety of different angles, the inter-relation of history and the social sciences. After making, in his first three essays, a direct statement of his point of view, the author deals with two main aspects of the subject: time sequences and theoretical relevance of facts. He then proceeds to exemplify his point of view more particularly with relation to macro-economics and to certain specific issues within economic history as well as to economic history in general. In the final two chapters, one is on Karl Marx, the other on Hugh Gaitskell, he seeks to describe the intellectual climate in which the debate on methodology was held and in which his opinions on the subject were formed. The essays contained in this book will be of interest to all those involved in the social sciences, economics and history, as well as to those specifically concerned with historical methodology.