The development of a complex network of international economic relations is a product of nineteenth-century liberalism and capitalism. They alone made possible the extensive specialization of modern production with its concomitant improvement in technology. In order to provide the family of an English worker with all it consumes and desires, every nation of the five continents cooperates. Tea for the breakfast table is provided by Japan or Ceylon, coffee by Brazil or Java, sugar by the West Indies, meat by Australia or Argentina, cotton from America or Egypt, hides for leather from India or Russia, and so on. And in exchange for these things, English goods go to all parts of the world, to the most remote and out-of-the-way villages and farmsteads. This development was possible and conceivable only because, with the triumph of liberal principles, people no longer took seriously the idea that a great war could ever again break out….
But events have turned out quite differently. Liberal ideas and programs were supplanted by socialism, nationalism, protectionism, imperialism, etatism, and militarism. Whereas Kant and Von Humboldt, Bentham and Cobden had sung the praises of eternal peace, the spokesmen of a later age never tired of extolling war, both civil and international. And their success came only all too soon. The result was the World War, which has given our age a kind of object lesson on the incompatibility between war and the division of labor.