I am grateful to a number of editors and publishers under whose auspices earlier and/or partial versions of chapters in this volume have appeared. Details are as follows:
A shorter, modified version of Chapter 1 (on The Wealth of Nations) was delivered in March 1976 as part of a Bicentennial lecture series at the University of Chicago and appeared in a special issue of the Journal of Law and Economics (vol. XIX (3), October 1976) edited by Professor Ronald Coase, to whom I am very much indebted.
Of Chapter 2, one section (IV), plus one or two other paragraphs, appeared in The Cambridge Journal published by Bowes and Bowes, November 1953, in an article entitled "James Mill and the Political Education of Ricardo".
Chapter 3 is based on an article contributed to The Marginal Revolution in Economics, 1973, edited by R. D. C. Black, A. W. Coats, and C. D. W. Goodwin (copyright 1972 by Duke University Press). This article has been very much rearranged, revised and supplemented.
Chapter 4 is a considerably revised version of an article which appeared in History of Political Economy, Fall 1969 (copyright 1969 ( 1972) by Duke University Press).
Origins of Chapter 5 are to be found in my articles:"Berkeley's Querist and the Economic Thought of the Eighteenth Century" ( British Journal for the Philosophy of Science, vol. IV, No. 13, 1953); and "Keynes und die Geschichte der Klassischen Nationalökonomie" ( Zeitschrift für Nationalökonomie, Band XVIII, Heft 4, 1958). This chapter is three or four times longer than those earlier essays. Some parts of it were delivered as lectures at Keio University in 1973 and have been published in Japanese translation by Professor Tamotsu Matsuura and Professor Hayasaka, to whom I am deeply grateful for their work as translators and also for their generous hospitality in October 1973.
Chapter 6 is based on the Appendix to Economists and Economic Policy in Britain 1946-1966 ( G. Allen and Unwin, 1968). Considerable alterations, additions and subtractions have been made.
Chapter 7 starts from some quotations from an article entitled 'Ex-