Thomas Prentice Kettell, former editor of the Democratic Review, was another commentator popular in the South to enjoy a great degree of prominence between 1857 and 1860. Kettell gathered an array of statistics in his book on Southern Wealth and Northern Profits, to show that the South produced vast wealth, while the North, with its dependence on raw materials, siphoned off the wealth of the South. Arguing that sectional inequality resulted from the concentration of manufacturing in the North, and from the North's supremacy in communications, transportation, finance, and international trade, his ideas paralleled old physiocratic doctrines that all profits of manufacturing and trade come out of the land. Political sociologists, such as Barrington Moore, have noted that these forms of romantic nostalgia tend to arise when industrialization takes hold.