The proletariat is the social class of wage-earners, those members of a society whose only possession of significant economic value is their labour power. A member of such a class is a proletarian. Marxist philosophy considers the proletariat to be exploited under capitalism, forced to accept meager wages in return for operating the means of production, which belong to the class of business owners, the bourgeoisie. Marx argued that this oppression gives the proletariat common economic and political interests that transcend national boundaries, impelling them to unite and take over power from the capitalist class, and eventually to create a communist society free from class distinctions.
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Marx used the term proletariat in his socio-political theory (Marxism) to describe a progressive working class untainted by private property and capable of revolutionary action to topple capitalism and abolish social classes, leading society to ever higher levels of prosperity and justice. Marx defined the proletariat as the social class having no significant ownership of the means of production and whose only means of subsistence is to sell their labor power for a wage or salary.
Lumpenproletariat refers to the underclass devoid of class consciousness. It may be used in an informal disapproving manner to describe people who are not clever or well educated, and who are not interested in changing or improving their situation.
The Bourgeoisie is a sociologically defined social class equivalent to the upper classes. They are contrasted with the proletariat by their relative affluence and their cultural and financial capital. In Marxist philosophy, the bourgeoisie is the social class that came to own the means of production during modern industrialization and whose societal concerns are the value of property and the preservation of capital to ensure the perpetuation of their economic supremacy in society. The bourgeoisie is the most important class of society opposing the proletariat, insofar as the employees their wages are higher possible while the owners intend to increase their profits by employing labor
… Read more at the lowest possible cost. From this de facto difference is born the Marxist concept of class struggle, the goal of any revolution being to abolish inequalities and in particular to reduce income inequalities.