An Inopportune Proposal--What is Currency?--The Primitive System of Barter--The Advantages possessed by the Precious Metals--Gold as a Standard of Value--Its Failure to remain Constant--Currency and Prices--The Complication of other Instruments of Credit--No Substitute for Gold in Sight--Its Acceptability not shaken by the War--A Fluctuating Standard not wholly Disadvantageous--An International Currency fatal to the Task of Reconstruction--Stability and Certainty the Great Needs. As if mankind had not enough on its hands at the present moment, a number of well-meaning people seem to think that this is an opportune time for raising obscure questions of currency, and trying to make the public take an interest in schemes for bettering man's lot by improving the arrangements under which international payments are carried out. Nobody can deny that some improvement is possible in this respect, but it may very well be doubted whether, at the present moment, when very serious problems of rebuilding have inevitably to be faced and solved, it is advisable to complicate them by introducing this difficult question which, whenever it is raised, will require the most careful and earnest consideration. Since, however, the question is in the air, it may be as well to consider what is wrong with our present methods, and what sort of improvements are suggested by the reformers. At present, as every one knows, international payments are in normal times ultimately settled by shipments from one country to another of gold. Gold has achieved this position for reasons which have been described in all the currency text-books. Mankind proceeded from a state of barter to a condition in which one particular commodity was used as the chief means of payment simply because this process was found to be much more convenient. Under a system of barter an exchange could only be effected between two people who happened to be possessed each of them of the thing which the other one wanted, and also at the same time to want the thing which the other one possessed, and the extent of their mutual wants had to lit so exactly that they were able to carry out the desired exchange. It must obviously have been rare that things happened so fortunately that mutually advantageous exchanges were possible, and the text-books invariably call attention to the difficulties of the baker who wanted a hat, but was unable to supply his need because the hatter did not want bread but fish or some other commodity.