Origin of the term Scientific Socialism
http://www.marxists.org/archive/dietzgen/works/1870s/scientific-socialism.htm
Engels took it from Karl Grun who in turn took it form Proudhon who first used the term. But Socialism: scientific and utopian wasn't published until 1880s and it had already been used at the title of Joseph Dietzgen's essay of 1873.4thwrite said:Might be wrong, but i'd always understood Sci Soc to come from Engels pamphlet (Socialism: scientific and utopian).
http://www.marxists.org/archive/dietzgen/works/1870s/scientific-socialism.htm

