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Science*, in "Socialist Bibliotek" Socialist Library, Vol. I, Copenhagen 1885; a Spanish one: Socialismo utopico y Socialismo cientifico, Madrid 1886; and a Dutch one: De Ontwikkeling van het Socialisme van Utopie tot Wetenschap The Development of Socialism from Utopia to Science. The Hague 1886.
The present edition has undergone various small changes; more important additions have been made in only two places: in the first chapter regarding Saint-Simon, who was given somewhat too little space compared to Fourier and Owen, and towards the end of the third regarding the new form of production that has meanwhile become important: the "trusts."
London, May 12, 1891.
Friedrich Engels.