The father of modern socialism is?

Karl MarxMarx believed that capitalism would be replaced by socialism which in turn would bring upon communism. He was the author of "The Communist Manifesto" and was well known for being the father of communism.

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AnswerKarl Marx

I believe the question is not clear. Truly Karl Marx with the assistance of Friedrich Engels is the father of communism. There were various "socialist" groups during the time period of Marx. Thus the question should be "Who was the father of communism".