The American fathers were, undoubtedly, aware of the misfortune of admitting under one general government, and on terms of equality, two mutually invasive and destructive social ideas and their corresponding systems of labor. But they were baffled at the time by what appeared to be a political necessity, and so met the grand emergency of the age by concession and a spirit of conciliation. Many of them, indeed, desired on economic as well as on moral grounds the abolition of slavery, and probably felt the more disposed to compromise with the evil in the general confidence with which they regarded its early and ultimate extinction. This humane expectation of the young republic failed of realization, owing primarily and chiefly, I think, to the potent influence upon the institution of slavery of certain labor-saving inventions and their industrial application in England and America during the last quarter of the eighteenth century. These epoch-making inventions were the spinning jenny of Hargreaves, the spinning machine of Arkwright and the mule of Crompton, in combination with the steam engine, which turned, says John Richard Green, "Lancastershire into a hive of industry." And last, though not least in its direct and indirect effects on slavery, was the cotton gin of Eli Whitney, which formed the other half--the other hand, so to speak--of the spinning frame. The new power loom in England created a growing demand for raw cotton, which the American contrivance enabled the Southern planter to meet with an increased supply of the same. Together these inventions operated naturally to enhance the value of slave labor and slave land, and therein conduced powerfully to the slave revival in the United States, which followed their introduction into the economic world. The slave industrial system, no longer then a declining factor in the life of the young nation, assumed, instead, unexpected importance in it, and started promptly upon a course of extraordinary expansion and prosperity.