In the "Principles of Political Economy," these opinions were promulgated, less clearly and fully in the first edition, rather more so in the second, and quite unequivocally in the third. The difference arose partly from the change of times, the first edition having been written and sent to press before the French Revolution of 1848, after which the public mind became more open to the reception of novelties in opinion, and doctrines appeared moderate which would have been thought very startling a short time before. In the first edition the difficulties of Socialism were stated so strongly, that the tone was on the whole that of opposition to it. In the year or two which followed, much time was given to the study of the best Socialistic writers on the Continent, and to meditation and discussion on the whole range of topics involved in the controversy: and the result was that most of what had been written on the subject in the first edition was cancelled, and replaced by arguments and reflections which represent a more advanced opinion.
Had I met with Mr Hare's system before the publication of my pamphlet, I should have given an account of it there. Not having done so, I wrote an article in Fraser's Magazine (reprinted in my miscellaneous writings) principally for that purpose, though I included in it, along with Mr Hare's book, a review of two other productions on the question of the day; one of them a pamphlet by my early friend, Mr John Austin, who had in his old age become an enemy to all further Parliamentary reform; the other an able and ingenious, though Partially erroneous, work by Mr Lorimer.
At the end of 1841, the book being ready for the press, I offered it to Murray, who kept it until too late for publication that season, and then refused it, for reasons which could just as well have been given at first. But I have had no cause to regret a rejection which led to my offering it to Mr Parker, by whom it was published in the spring of 1843. My original expectations of success were extremely limited. Archbishop Whately had, indeed, rehabilitated the name of Logic, and the study of the forms, rules, and fallacies of Ratiocination; and Dr. Whewell's writings had begun to excite an interest in the other part of my subject, the theory of induction. A treatise, however, on a matter so abstract, could not be expected to be popular; it could only be a book for students, and students on such subjects were not only (at least in England) few, but addicted chiefly to the opposite school of metaphysics, the ontological and "innate principles" school. I therefore did not expect that the book would have many readers, or approvers; and looked for little practical effect from it, save that of keeping the tradition unbroken of what I thought a better philosophy. What hopes I had of exciting any immediate attention, were mainly grounded on the polemical propensities of Dr Whewell; who, I thought, from observation of his conduct in other cases, would probably do something to bring the book into notice, by replying, and that promptly, to the attack on his opinions. He did reply but not till 1850, just in time for me to answer him in the third edition. How the book came to have, for a work of the kind, so much success, and what sort of persons compose the bulk of those who have bought, I will not venture to say read, it, I have never thoroughly understood. But taken in conjunction with the many proofs which have since been given of a revival of speculation, speculation too of a free kind, in many quarters, and above all (where at one time I should have least expected it) in the Universities, the fact becomes partially intelligible. I have never indulged the illusion that the book had made any considerable impression on philosophical opinion. The German, or Ã priori view of human knowledge, and of the knowing faculties, is likely for some time longer (though it may be hoped in a diminishing degree) to predominate among those who occupy themselves with such inquiries, both here and on the Continent. But the "System of Logic" supplies what was much wanted, a text-book of the opposite doctrine â€” that which derives all knowledge from experience, and all moral and intellectual qualities principally from the direction given to the associations. I make as humble an estimate as anybody of what either an analysis of logical processes, or any possible canons of evidence, can do by themselves, towards guiding or rectifying the operations of the understanding. Combined with other requisites, I certainly do think them of great use; but whatever may be the practical value of a true philosophy of these matters, it is hardly possible to exaggerate the mischiefs of a false one. The notion that truths external to the mind may be known by intuition or consciousness, independently of observation and experience, is, I am persuaded, in these times, the great intellectual support of false doctrines and bad institutions. By the aid of this theory, every inveterate belief and every intense feeling, of which the origin is not remembered, is enabled to dispense with the obligation of justifying itself by reason, and is erected into its own all-sufficient voucher and justification. There never was such an instrument devised for consecrating all deep-seated prejudices. And the chief strength of this false philosophy in morals, politics, and religion, lies in the appeal which it is accustomed to make to the evidence of mathematics and of the cognate branches of physical science. To expel it from these, is to drive it from its stronghold: and because this had never been effectually done, the intuitive school, even after what my father had written in his Analysis of the Mind, had in appearance, and as far as published writings were concerned, on the whole the best of the argument. In attempting to clear up the real nature of the evidence of mathematical and physical truths, the "System of Logic" met the intuitive philosophers on ground on which they had previously been deemed unassailable; and gave its own explanation, from experience and association, of that peculiar character of what are called necessary truths, which is adduced as proof that their evidence must come from a deeper source than experience. Whether this has been done effectually, is still sub judice; and even then, to deprive a mode of thought so strongly rooted in human prejudices and partialities, of its mere speculative support, goes but a very little way towards overcoming it; but though only a step, it is a quite indispensable one; for since, after all, prejudice can only be successfully combated by philosophy, no way can really be made against it permanently until it has been shown not to have philosophy on its side.
At this time, and thenceforth, a great proportion of all my letters (including many which found their way into the newspapers12 ) were not written by me but by my daughter; at first merely from her willingness to help in disposing of a mass of letters greater than I could get through without assistance, but afterwards because I thought the letters she wrote superior to mine, and more so in proportion to the difficulty and importance of the occasion. Even those which I wrote myself were generally much improved by her, as is also the case with all the more recent of my prepared speeches, of which, and of some of my published writings, not a few passages, and those the most successful, were hers.