Class conflict, also class war or class warfare, is both the friction that accompanies social relationships between members or groups of different social classes and the underlying tensions or antagonisms which exist in society due to conflicting interests that arise from different social positions. Class conflict is thought to play a pivotal role in history of class societies (such as capitalism and feudalism) by Marxists who refer to its overt manifestations as class war, a struggle that is viewed by them as a product of capitalism.
Class conflict can take many different shapes. Direct violence, such as wars fought for resources and cheap labor; indirect violence, such as deaths from poverty, starvation or unsafe working conditions; coercion, such as the threat of losing a job or pulling an important investment; or ideology, either intentionally (as with books and articles promoting anti-capitalism) or unintentionally (as with the promotion of consumerism through advertising).
It can be open, as with a lockout aimed at destroying a labor union, or hidden, as with an informal slowdown in production protesting low wages or unfair labor practices.
The typical example of class conflict described is class conflict within capitalism. This class conflict is seen to occur primarily between the bourgeoisie and the proletariat, and take the form of conflict over hours of work, value of wages, cost of consumer goods, the culture at work, control over parliament or bureaucracy, and economic inequality. The particular implementation of government programs which may seem purely humanitarian, such as disaster relief, can actually be a form of class conflict. Apart from these day to day forms of class conflict, during periods of crisis or revolution class conflict takes on a violent nature and involves repression, assault, restriction of civil liberties and murderous violence such as assassinations or death squads.
A variety of predominantly Marxist and anarchist thinkers argue that class conflict exists in Soviet-style societies. These arguments describe as a class the bureaucratic stratum formed by the ruling political party (known as the Nomenklatura in the Soviet Union)-- sometimes termed a "new class". -- that controls the means of production. This ruling class is viewed to be in opposition to the remainder of society, generally considered the proletariat. This type of system is referred to by its detractors as state capitalism, state socialism, bureaucratic collectivism, coordinatorism, or new class societies.