Until recently, students of the Industrial Revolution of the 18th and 19th centuries concentrated on technological changes or on labor and social problems but neglected capital and the capitalist. Mantoux gave 160 pages to technology, 100 to labor, and only 34 to capital. Mrs. Knowles devoted 8½ pages out of 392 to capital, companies, and combinations. The Hammonds have given us volumes on the town laborer, the skilled laborer, and the village laborer, but we still lack the book Unwin once hoped they would write on the working life and ideals of the entrepreneur.