These figures show the significance of the Mississippi Valley in its pressure upon the older section by the competition of its cheap lands, its abundant harvests, and its drainage of the labor supply. All of these things meant an upward lift to the Eastern wage earner. But they meant also an increase of political power in the Valley. Before the War of 1812 the Mississippi Valley had six senators, New England ten, the Middle States ten, and the South eight. By 1840 the Mississippi Valley had twenty-two senators, double those of the Middle States and New England combined, and nearly three times as many as the Old South; while in the House of Representatives the Mississippi Valley outweighed any one of the old sections. In 1810 it had less than one-third the power of New England and the South together in the House. In 1840 it outweighed them both combined and because of its special circumstances it held the balance of power. While the Mississippi Valley thus rose to superior political power as compared with any of the old sections, its economic development made it the inciting factor in the industrial life of the nation. After the War of 1812 the steamboat revolutionized the transportation facilities of the Mississippi Valley. In each economic area a surplus formed, demanding an outlet and demanding returns in manufactures. The spread of cotton into the lower Mississippi Valley and the Gulf Plains had a double significance. This transfer of the center of cotton production away from the Atlantic South not only brought increasing hardship and increasing unrest to the East as the competition of the virgin soils depressed Atlantic land values and made Eastern labor increasingly dear, but the price of cotton fell also in due proportion to the increase in production by the Mississippi Valley. While the transfer of economic power from the Seaboard South to the Cotton Kingdom of the lower Mississippi Valley was in progress, the upper Mississippi Valley was leaping forward, partly under the stimulus of a market for its surplus in the plantations of the South, where almost exclusive cultivation of the great staples resulted in a lack of foodstuffs and livestock. At the same time the great river and its affluents became the highway of a commerce that reached to the West Indies, the Atlantic Coast, Europe, and South America. The Mississippi Valley was an industrial entity, from Pittsburgh and Santa Fe to New Orleans. It became the most important influence in American politics and industry. Washington had declared in 1784 that it was the part of wisdom for Virginia to bind the West to the East by ties of interest through internal improvement thereby taking advantage of the extensive and valuable trade of a rising empire.