C P. Kindleberger once described economic history as “great fun” but not very useful for understanding what happens in the real world. W. N. Parker, on the other hand, doesn't regard it as at all amusing, but terribly important. Within that range, surely, each of us can locate his own ratio of practicality to enjoyment inherent in the pursuit of economic history. I myself was drawn to the study of economic history, even before I was aware of its existence—in fact, it was my youthful intention to invent the discipline—by two distinct motives. On the one hand, I wanted to enter (or create) a profession in which the work itself would yield intellectual pleasure. At the same time, having just lived through the longest depression in modern times and the most destructive war in history, I wanted to do something that would be useful to society. History, I knew, was interesting. Economics, I assumed, was important. I therefore resolved to give up the study of engineering, which had occupied me briefly before the war, and to create the new discipline of economic history. I was mildly surprised to discover upon enrolling in the Yale Studies for Returning Servicemen that the discipline did, indeed, already exist, and was, furthermore, ably represented at Yale by none other than Harold F. Williamson.