The reader should notice, further, the different parts played by discount policy under the one régime and under the other. With the pre-war method discount policy is a vital part of the process for restoring equilibrium between internal and external prices. With the post-war method it is not equally indispensable, since the fluctuation of the exchanges can bring about equilibrium without its aid;—though it remains, of course, as an instrument for influencing the internal price level and through this the exchanges, if we desire to establish either the one or the other at a different level from that which would have prevailed otherwise.

III. The Restoration of a Gold Standard.

Our conclusions up to this point are, therefore, that, when stability of the internal price level and stability of the external exchanges are incompatible, the former is generally preferable; and that on occasions when the dilemma is acute, the preservation of the former at the expense of the latter is, fortunately perhaps, the line of least resistance.

The restoration of the gold standard (whether at the pre-war parity or at some other rate) certainly will not give us complete stability of internal prices and can only give us complete stability of the external exchanges if all other countries also restore the gold standard. The advisability of restoring it depends, therefore, on whether, on the whole, it will give us the best working compromise obtainable between the two ideals.

The advocates of gold, as against a more scientific standard, base their cause on the double contention, that in practice gold has provided and will provide a reasonably stable standard of value, and that in practice, since governing authorities lack wisdom as often as not, a managed currency will, sooner or later, come to grief. Conservatism and scepticism join arms—as they often do. Perhaps superstition comes in too; for gold still enjoys the prestige of its smell and colour.

The considerable success with which gold maintained its stability of value in the changing world of the nineteenth century was certainly remarkable. I have applauded it in the first chapter. After the discoveries of Australia and California it began to depreciate dangerously, and before the exploitation of South Africa it began to appreciate dangerously. Yet in each case it righted itself and retained its reputation.

But the conditions of the future are not those of the past. We have no sufficient ground for expecting the continuance of the special conditions which preserved a sort of balance before the war. For what are the underlying explanations of the good behaviour of gold during the nineteenth century?

In the first place, it happened that progress in the discovery of gold mines roughly kept pace with progress in other directions—a correspondence which was not altogether a matter of chance, because the progress of that period, since it was characterised by the gradual opening up and exploitation of the world’s surface, not unnaturally brought to light pari passu the remoter deposits of gold. But this stage of history is now almost at an end. A quarter of a century has passed by since the discovery of an important deposit. Material progress is more dependent now on the growth of scientific and technical knowledge, of which the application to gold-mining may be intermittent. Years may elapse without great improvement in the methods of extracting gold; and then the genius of a chemist may realise past dreams and forgotten hoaxes, transmuting base into precious like Subtle, or extracting gold from sea-water as in the Bubble. Gold is liable to be either too dear or too cheap. In either case, it is too much to expect that a succession of accidents will keep the metal steady.

But there was another type of influence which used to aid stability. The value of gold has not depended on the policy or the decisions of a single body of men; and a sufficient proportion of the supply has been able to find its way, without any flooding of the market, into the Arts or into the hoards of Asia for its marginal value to be governed by a steady psychological estimation of the metal in relation to other things. This is what is meant by saying that gold has “intrinsic value” and is free from the dangers of a “managed” currency. The independent variety of the influences determining the value of gold has been in itself a steadying influence. The arbitrary and variable character of the proportion of gold reserves to liabilities maintained by many of the note-issuing banks of the world, so far from introducing an incalculable factor, was an element of stability. For when gold was relatively abundant and flowed towards them, it was absorbed by their allowing their ratio of gold reserves to rise slightly; and when it was relatively scarce, the fact that they had no intention of ever utilising their gold reserves for any practical purpose, permitted most of them to view with equanimity a moderate weakening of their proportion. A great part of the flow of South African gold between the end of the Boer War and 1914 was able to find its way into the central gold reserves of European and other countries with the minimum effect on prices.

But the war has effected a great change. Gold itself has become a “managed” currency. The West, as well as the East, has learnt to hoard gold; but the motives of the United States are not those of India. Now that most countries have abandoned the gold standard, the supply of the metal would, if the chief user of it restricted its holdings to its real needs, prove largely redundant. The United States has not been able to let gold fall to its “natural” value, because it could not face the resulting depreciation of its standard. It has been driven, therefore, to the costly policy of burying in the vaults of Washington what the miners of the Rand have laboriously brought to the surface. Consequently gold now stands at an “artificial” value, the future course of which almost entirely depends on the policy of the Federal Reserve Board of the United States. The value of gold is no longer the resultant of the chance gifts of Nature and the judgment of numerous authorities and individuals acting independently. Even if other countries gradually return to a gold basis, the position will not be greatly changed. The tendency to employ some variant of the gold-exchange standard and the probably permanent disappearance of gold from the pockets of the people are likely to mean that the strictly necessary gold reserves of the Central Banks of the gold-standard countries will fall considerably short of the available supplies. The actual value of gold will depend, therefore, on the policy of three or four of the most powerful Central Banks, whether they act independently or in unison. If, on the other hand, pre-war conventions about the use of gold in reserves and in circulation were to be restored—which is, in my opinion, the much less probable alternative—there might be, as Professor Cassel has predicted, a serious shortage of gold leading to a progressive appreciation in its value.