decades. Marxism Marxism defines social classes according to their relationship with the means of production. The main basis of social class division of Marxism: the possession of means of production, the role and position it plays in social labor organization (production process), the distribution of wealth and resources and the amount.The "middle class" is said to be the class below the ruling class and above the proletariat in the Marxist social schema and is synonymous with the term "petite-" or "petty-bourgeoisie". Marxist writers have used the term in two distinct but related ways. In the first sense, it is used for the bourgeoisie (the urban merchant and professional class) that arose between the aristocracy and the proletariat in the waning years of feudalism in the Marxist model. V. I. Lenin stated that the "peasantry ... in Russia constitute eight- or nine-tenths of the petty bourgeoisie". However, in modern developed countries, Marxist writers define the petite bourgeoisie as primarily comprising (as the name implies) owners of small to medium-sized businesses, who derive their income from the exploitation of wage-laborers (and who are in turn exploited by the "big" bourgeoisie i.e. bankers, owners of large corporate trusts, etc.) as well as the highly educated professional class of doctors, engineers, architects, lawyers, university professors, salaried middle-management of capitalist enterprises of all sizes, etc. – as the "middle class" which stands between the ruling capitalist "owners of the means of production" and the working class (whose income is derived solely from hourly wages). Pioneer 20th century American Marxist theoretician Louis C. Fraina (Lewis Corey) defined the middle class as "the class of independent small enterprisers, owners of productive property from which a livelihood is derived". From Fraina's perspective, this social category included "propertied farmers" but not propertyless tenant farmers. Middle class also included salaried managerial and supervisory employees but not "the masses of propertyless, dependent salaried employees. Fraina speculated that the entire category of salaried employees might be adequately described as a "new middle class" in economic terms, although this remained a social grouping in which "most of whose members are a new proletariat." Professional-managerial class In 1977 Barbara Ehrenreich and her then husband John defined a new class in the United States as "salaried mental workers who do not own the means of production and whose major function in the social division of labor ... [is] ... the reproduction of capitalist culture and