Paul Lafargue

He was Karl Marx's son-in-law, having married his second daughter, Laura. At the age of 69, he and 66-year-old Laura died together in a suicide pact.
Lafargue was the subject of a famous quotation by Marx. Soon before Marx died in 1883, he wrote a letter to Lafargue and the French Workers' Party organizer Jules Guesde, both of whom already claimed to represent "Marxist" principles. Marx accused them of "revolutionary phrase-mongering" and of denying the value of reformist struggles. This exchange is the source of Marx's remark, reported by Friedrich Engels, "" ("If one thing is certain, I am not a Marxist"). Provided by Wikipedia
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