“War is one of the great agencies by which human progress is effected

“War is one of the great agencies by which human progress is effected. Scourge though it be, and much as its practice is to be deplored, we must still recognize war as the operation of the economic laws of nature for the government of the human family. It stimulates national growth, solves otherwise insoluble problems of domestic and political economy” S. B. Luce, The Benefits of War, 1891
Was he right? Your answer should discuss the political, social, and economic evolution of the United States in the 1890s. How does it shape the 20th century and our own time?