Marxian class theory  Marxian class theory asserts that an individual's position within a class hierarchy is determined by their role in the production process, and argues that political and ideological consciousness is determined by class position. A class is those who share common economic interests, are conscious of those interests, and engage in collective action which advances those interests. Within Marxian class theory, the structure of the production process forms the basis of class construction. To Marx, a class is a group with intrinsic tendencies and interests that differ from those of other groups within society, the basis of a fundamental antagonism between such groups. For example, it is in the laborer's best interest to maximize wages and benefits and in the capitalist's best interest to maximize profit at the expense of such, leading to a contradiction within the capitalist system, even if the laborers and capitalists themselves are unaware of the clash of interests. Marxian class theory has been open to a range of alternate positions, most notably from scholars such as E. P. Thompson and Mario Tronti. Both Thompson and Tronti suggest class consciousness within the production process precedes the formation of productive relationships. In this sense, Marxian class theory often relates to discussion over pre-existing class struggles. Karl Marx's class theory derives from a range of philosophical schools of thought including left Hegelianism, Scottish Empiricism, and Anglo-French political-economics. Marx's view of class originated from a series of personal interests relating to social alienation and human struggle, whereby the formation of class structure relates to acute historical consciousness. Political-economics also contributed to Marx's theories, centering on the concept of "origin of income" where society is divided into three sub-groups: Rentier, Capitalist, and Worker. This construction is based on David Ricardo's theory of capitalism. Marx strengthened this with a discussion over verifiable class relationships. Marx sought to define class as embedded in productive relations rather than social status. His political and economic thought developed towards an interest in production as opposed to distribution, and this henceforth became a central theme in his concept of class. Marx distinguishes one class from another on the basis of two criteria: ownership of the means of production and control of the labor power of others. From this, Marx states "Society as a whole is more and more splitting up into two great hostile camps, into two great classes directly facing each other":  I. Capitalists, or bourgeoisie, own the means of production and purchase the labor power of others  II. Workers, or proletariat, do not own any means of production or the ability to purchase the labor power of others.