Class struggle is the active expression of a theoretical class conflict looked at from any kind of socialist perspective. Karl Marx and Friedrich Engels, leading ideologists of communism, wrote "The history of all hitherto existing society is the history of class struggle”. Marx’s notion of class has nothing to do with social class in the sociological sense of upper, middle and lower classes (which are often defined in terms of quantitative income or wealth). Instead, in an age of capitalism, Marx describes an economic class. Membership in a class is defined by one's relationship to the means of production, i.e., one's position in the social structure that characterizes capitalism. Marx talks mainly about two classes that include the vast majority of the population, the proletariat and the bourgeoisie. Other classes such as the petty bourgeoisie share characteristics of both of these main classes.
Main class struggle
Marxist analysis of society identifies two main social groups: * Labour (the proletariat or workers) includes anyone who earns their livelihood by selling their labor power and being paid a wage or salary for their labor time. They have little choice but to work for capital, since they typically have no independent way to survive. * Capital (the bourgeoisie or capitalists) includes anyone who gets their income not from labor as much as from the surplus value they appropriate from the workers who create wealth. The income of the capitalists, therefore, is based on their exploitation of the workers (proletariat).
What Marx points out is that members of each of the two main classes have interests in common. These class or collective interests are in conflict with those of the other class as a whole. This in turn leads to conflict between individual members of different classes.An example of this would be a factory producing a commodity, such as the manufacture of widgets (a standard imaginary commodity in economics books). Some of