Joseph Priestley's Criticisms of David Hume's Philosophy

Joseph Priestley's Criticisms of David Hume's Philosophy RICHARD H. POPKIN ONE OF HUME'S MOST FAMOUS CRITICS, the great scientist Joseph Priestley (1733-1804), is scarcely mentioned or studied in the Hume literature.' Perhaps because of the course philosophy followed after Hume, the Scottish Common Sense critics and the German ones connected with Kant are given almost all of the attention . In this paper 1 shall try to correct this oversight, and examine the background of Priestley's critique of Hume, both in terms of Priestley's scientific and religious views and in terms of Hume's influence at the time. I shall then evaluate the merits of Priestley's critique and attempt to determine whether it deserves further study or should be returned to the obscurity it has been in for almost two centuries. 2 Joseph Priestley was a nonconforming minister whose progressively radical views caused him to lose various posts. Eventually he became a millenarian, convinced that crucial signs of the end of the world were at hand: the events of the French Revolution; the purported discovery of the Lost Tribes in Afghanistan by Sir William Jones; plans or hopes for the Jews to return to Palestine and join forces with the Christians. After years of religious wanderings Priestley ended up a millenarian Unitarian, much in the tradition of Sir Isaac Newton, whose religious writing he used extensively, and of Newton's successor, William Whiston? Priestley taught science in various schools and was immensely influenced by David Hartley's Observations on Man. He found in Hartley's theory of association of ideas a naturalistic way of explaining human mental life. And in Hartley's millenarian views he located the sort of theology he was seeking. Priestly later reedited Hartley, including introductory essays about some of the more difficult aspects of his mechanistic psychology.' (Coleridge, who was deeply impressed by ' T. E. Jessop, A Bibliography of David Hume and of the Scottish Philosophy from l-)'ancis Hutcheson to Lord Balfour (New York, 1966), lists the titles of Priestley's works relevant to Hume. However, there appear to be no discussions of Priestley on Hume listed in this work or in Roland Hill, A Bibliography of David Hume from 1930 (York, 1971). E. C. Mossner, The Life of David Hume (Edinburgh, 1954), mentions Priestley's criticisms of Hume, but only as these were made in connection with criticisms of Beattie. Joseph Priestley, Memoirs of Dr. Joseph Priestley to the Year 1795, written by Himself, with a Continuation to the time of his decease by his son, Joseph Priestley, ed. T. Cooper (London, 1806). It is also of some interest that Priestley attacked Reid, Beattie, and Oswald a few years before challenging Hume. He seemed to think that he had disposed of the Scottish Philosophy for all time. Thus Priestley was certainly no part of the mainstream of Hume's opponents in Britain. See Memoirs, pp. 78-79n, and n. 16 below. ' On Priestley's career, see his Memoirs. Modern biographies deal principally with his scientific achievements and ignore or play down his theological concerns. For an extended discussion of Priestley's millenarian views, see Clarke Garrett, Respectable Folly (Baltimore, 1975), pp. 126-143. " Priestley, Hartley's Theory of the Human Mind, on the Principle of the Association of Ideas . . . (London, 1775). [437] 438 HISTORY OF PHILOSOPHY Hartley, probably read Priestley's edition of his works.) For the most part, Priestley wrote long and controversial works on theology. His scientific achievements stem from his friendship with Benjamin Franklin and Richard Price, who encouraged him to write a history of discoveries in electricity. Franklin provided the resources for making the equipment. On the basis of the new material in his work, Priestley was nominated to the Royal Society by Franklin and Price. s Priestley's most famous scientific works came thereafter--his discovery of oxygen and his work on how the human body used oxygen. Later still, he became entangled in a controversy with Lavoisier over the phlogiston theory, Priestley upholding it, the French chemist opposing it. 6 Priestley was also active in politics, supporting radical causes. He supported John Wilkes, of whom Hume thoroughly disapproved, and was an early...