OUTLINE OF SUBJECTS.
In only two cases do the letters of this collection form groups that have a subject of their own not discussed at any length in the other letters. Letters I to XIV are the only ones that discuss at any length the influence of the Depreciation of the Currency on the Foreign Exchanges. Letters LXXVIII to LXXXVIII are the only ones that so discuss the Measure of Value. After these the nearest approach to continuity is perhaps in Letters LXXI to LXXVII, when Over-production is the chief subject. But the discussion of Rent, Wages and Profits is not conducted by chapters as in a book; it follows the course of conversations which were not recorded, and obeys suggestions that are given in replies lost to us. We cannot hope to make the propositions on these three heads fall into a consecutive logical series.
The following analysis of the letters is not meant to be exhaustive. Ricardo's opinions on the Bank of England (XXXV, etc.) and on the East India College (XL, etc.), for example, will not be found in it. It is simply a statement of the chief economical arguments.
In the early letters the correspondence turns chiefly on matters made prominent at the time (1810 seq.) by the Bullion Committee and Ricardo's own pamphlet, 'The High Price of Gold Bullion.' Though this pamphlet did not appear in its separate form till early in 1810, the matter of it had been published by Ricardo in a series of letters to the 'Morning Chronicle' beginning in September, 1809. These letters brought their author into public notice, and they seem to have led Malthus to seek his acquaintance. The earliest letters (of which Letter I in this collection was clearly not the first of the whole correspondence) were naturally on the subjects that first brought the two men together.
Ricardo's main positions as against Malthus are as follows:—
1. The amount of the currency of a nation is determined for it not simply by its size and population but by the nature and extent of its trading transactions; and yet, when these elements are given, the currency of one nation will stand to the currency of another in some ascertainable normal proportion, to alter which is to alter the relative value of the currencies affected (VI, VII, X).
2. Such events as a bad harvest, a change in articles of consumption or the transmission of a subsidy abroad, will, by altering the relative value of our currency, produce effects on the exchanges which, apart from their own specific remedy, are permanent, not transitory (I, VII, X).
3. An increase in the amount of gold and silver in a country will lead to an increased use of these metals for general purposes rather than to a proportionate fall in their value, there (II, III).
4. An increase in the value of a nation's exports and imports may involve no increase of its wealth or its capital, but may be due to a mere change from one set of articles of consumption to another, or to a carrying trade with foreign capital (IV).
5. In any case, such an increase is not the cause, but the effect of a change in the currency; it is a sign that money is going from where it is cheap to where it is dear (IV, VI, IX, cf. XII and XVII), and the Exchanges are an accurate measure of the difference (VII).