Plausible as the idea of the United States of Europe as a peace arrangement may seem to some at first glance, it has on closer examination not the least thing in common with the method of thought and the standpoint of social democracy... At the present stage of development of the world market and of world economy, the conception of Europe as an isolated economic unit is a sterile concoction of the brain. Europe no more forms a special unit within world economy than does Asia or America.

Peace Utopias (1911)