Which theorist coined the term lumpenproletariat to describe those "discarded" by the system, such as the homeless?

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Karl Marx coined the term lumpenproletariat in his writings on class struggle, referring to those who were not engaged in productive labor and considered to be outside of the working class. This included groups such as beggars, vagrants, and the homeless who were considered by Marx to be disconnected from the means of production and therefore unable to participate in the class struggle in the same way as the working class.

Which Theorist Coined the Term Lumpenproletariat to Describe Those "Discarded