In this piece at The Atlantic, there are some amazing statistics about how cotton dominated world trade at the start of the Civil War:
By the time shots were fired on Fort Sumter in April 1861, cotton was the core ingredient of the world’s most important manufacturing industry. The manufacture of cotton yarn and cloth had grown into “the greatest industry that ever had or could by possibility have ever existed in any age or country,” according to the self-congratulatory but essentially accurate account of British cotton merchant John Benjamin Smith. By multiple measures—the sheer numbers employed, the value of output, profitability—the cotton empire had no parallel.That is amazing. The article goes on to describe how the world economy adapted to the interruption of cotton exports from the Confederate States during the war. I'm just amazed at how things were beforehand.
One author boldly estimated that in 1862, fully 20 million people worldwide—one out of every 65 people alive—were involved in the cultivation of cotton or the production of cotton cloth. In England alone, which still counted two-thirds of the world’s mechanical spindles in its factories, the livelihood of between one-fifth and one-fourth of the population was based on the industry; one-tenth of all British capital was invested in it, and close to one-half of all exports consisted of cotton yarn and cloth. Whole regions of Europe and the United States had come to depend on a predictable supply of cheap cotton. Except for wheat, no “raw product,” so the Journal of the Statistical Society of London declared, had “so complete a hold upon the wants of the race.”
The industry that brought great wealth to European manufacturers and merchants, and bleak employment to hundreds of thousands of mill workers, had also catapulted the United States onto center stage of the world economy, building “the most successful agricultural industry in the States of America which has been ever contemplated or realized.” Cotton exports alone put the United States on the world economic map. On the eve of the Civil War, raw cotton constituted 61 percent of the value of all U.S. products shipped abroad. Before the beginnings of the cotton boom in the 1780s, North America had been a promising but marginal player in the global economy.
Now, in 1861, the flagship of global capitalism, Great Britain, found itself dangerously dependent on the white gold shipped out of New York, New Orleans, Charleston, and other American ports. By the late 1850s, cotton grown in the United States accounted for 77 percent of the 800 million pounds of cotton consumed in Britain. It also accounted for 90 percent of the 192 million pounds used in France, 60 percent of the 115 million pounds spun in the Zollverein, and 92 percent of the 102 million pounds manufactured in Russia.