Eduard Bernstein (January 6 1850 - December 18 1932) was a German social democratic theoretician and politician, member of the SPD, and founder of evolutionary socialism or reformism. Wikipedia
The definitive Wikipedia entry for Eduard Bernstein. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Eduard_Bernstein
Initially his arguments were rebuffed at the 1903 Party Congress in Dresden but increasingly Bernsteins conceptions became enshrined in the actual political practice of the party. www.marxists.org/reference/archive/bernstein/index.htm