Of all the great effects produced upon human society by the discovery of America, there were probably none so marked as those brought about by the great influx of the precious metals from the New World to the Old. European industry had been declining under the decreasing stock of the precious metals and an appreciating standard of values; human ingenuity grew dull under the paralyzing influences of declining profits, and capital absorbed nearly all that should have been divided between it and labor. But an increase of the precious metals, in such quantity as to check this tendency, operated as a new motive power to the machinery of commerce. Production was stimulated by finding the advantages of a change in the standard on its side. Instead of being repressed by having to pay more than it had stipulated for the use of capital, it was stimulated by paying less. Capital, too, was benefited, for new demands were created for it by the new uses which a general movement in industrial pursuits had developed; so that if it lost a little by a change in the standard, it gained much more in the greater demand for its use, which added to its capacity for reproduction, and to its real value. The mischief would be great, indeed, if all the world were to adopt but one of the precious metals as the standard of value. To adopt gold alone would diminish the specie currency more than one-half; and the reduction the other way, should silver be taken as the only standard, would be large enough to prove highly disastrous to the human race. The Encyclopædia Britannica, 1859 (article Precious Metals, by J. R. McCulloch), says: A fall in the value of the precious metals, caused by the greater facility of their production, or by the discovery of new sources of supply, depends in no degree on theories of philosophers or the decision of statesmen or legislators, but is the result of circumstances beyond human control; and although, like a fall of rain after a long course of dry weather, it may be prejudicial to certain classes, it is beneficial to an incomparably greater number, including all who are engaged in industrial pursuits, and is, speaking generally, of great public or national advantage. Ernest Seyd, 1868 (Bullion, page 613), says: Upon this one point all authorities on the subject are agreed, to wit, that the large increase in the supply of gold has given a universal impetus to trade, commerce, and industry, and to general social development and progress. The American Review (1876) says: