Social class

In political science, the term class struggle, class conflict, or class war refers to the economic antagonism and political tension that exist among social classes because of clashing interests, competition for limited resources, and inequalities of power in the socioeconomic hierarchy. In its simplest manifestation, class struggle refers to the conflict between classes within class systems .

In the writings of several leftist, socialist, and communist theorists, notably those of Karl Marx, class struggle is a core tenet and a practical means for effecting radical sociopolitical transformations for the majority working class. It is also a central concept within conflict theories of sociology and political philosophy.

Intersectionality is an analytical framework for understanding how groups' and individuals' social and political identities result in unique combinations of discrimination and privilege. Examples of these intersecting and overlapping factors include gender, caste, sex, race, ethnicity, class, sexuality, religion, disability, physical appearance, and age. These factors can lead to both empowerment and oppression.

Intersectionality arose in reaction to both white feminism and the then male-dominated Black liberation movement, citing the "interlocking oppressions" of racism, sexism and heteronormativity. It broadens the scope of the first and second waves of feminism, which largely focused on the experiences of women who were white, cisgender, and middle-class, to include the different experiences of women of color, poor women, immigrant women, and other groups, and aims to separate itself from white feminism by acknowledging women's differing experiences and identities.

Upper class in modern societies is the social class composed of people who hold the highest social status. Usually, these are the wealthiest members of class society, and wield the greatest political power. According to this view, the upper class is generally distinguished by immense wealth which is passed on from generation to generation. Prior to the 20th century, the emphasis was on aristocracy, which emphasized generations of inherited noble status, not just recent wealth.

Because the upper classes of a society may no longer rule the society in which they are living, they are often referred to as the old upper classes, and they are often culturally distinct from the newly rich middle classes that tend to dominate public life in modern social democracies. According to the latter view held by the traditional upper classes, no amount of individual wealth or fame would make a person from an undistinguished background into a member of the upper class as one must be born into a family of that class and raised in a particular manner to understand and share upper class values, traditions, and cultural norms. The term is often used in conjunction with terms like upper-middle class, middle class, and working class as part of a model of social stratification.

Geographical segregation exists whenever the proportions of population rates of two or more populations are not homogeneous throughout a defined space. Populations can be considered any plant or animal species, human genders, followers of a certain religion, people of different nationalities, ethnic groups, etc.

In social geography segregation of ethnic groups, social classes and genders is often measured by the calculation of indices such as the index of dissimilarity. Different dimensions of segregation (or its contrary) are recognized: exposure, evenness, clustering, concentration, centralization, etc. More recent studies also highlight new local indices of segregation.

A civilization (also spelled civilisation in British English) is any complex society characterized by the development of the state, social stratification, urbanization, and symbolic systems of communication beyond signed or spoken languages (namely, writing systems).

Civilizations are organized around densely populated settlements, divided into more or less rigid hierarchical social classes of division of labour, often with a ruling elite and subordinate urban and rural populations, which engage in intensive agriculture, mining, small-scale manufacture and trade. Civilization concentrates power, extending human control over the rest of nature, including over other human beings. Civilizations are characterized by elaborate agriculture, architecture, infrastructure, technological advancement, currency, taxation, regulation, and specialization of labour.

Identity politics is politics based on a particular identity, such as ethnicity, race, nationality, religion, denomination, gender, sexual orientation, social background, political affiliation, caste, age, education, disability, opinion, intelligence, and social class. The term encompasses various often-populist political phenomena and rhetoric, such as governmental migration policies that regulate mobility and opportunity based on identities, left-wing agendas involving intersectional politics or class reductionism, and right-wing nationalist agendas of exclusion of national or ethnic "others".

The term identity politics dates to the late twentieth century, although it had precursors in the writings of individuals such as Mary Wollstonecraft and Frantz Fanon. Many contemporary advocates of identity politics take an intersectional perspective, which they argue accounts for a range of interacting systems of oppression that may affect a person's life and originate from their various identities. To these advocates, identity politics helps center the experiences of those they view as facing systemic oppression so that society can better understand the interplay of different forms of demographic-based oppression and ensure that no one group is disproportionately affected by political actions. Contemporary identity labels—such as people of specific race, ethnicity, sex, gender identity, sexual orientation, age—are not mutually exclusive but are, in many cases, compounded into one when describing hyper-specific groups. An example is that of African-American homosexual women, who can constitute a particular hyper-specific identity class.

Marxist historiography, or historical materialist historiography, is an influential school of historiography. The chief tenets of Marxist historiography include the centrality of social class, social relations of production in class-divided societies that struggle against each other, and economic constraints in determining historical outcomes (historical materialism). Marxist historians follow the tenets of the development of class-divided societies, especially modern capitalist ones.

Marxist historiography has developed in varied ways across different regional and political contexts. It has had unique trajectories of development in the West, the Soviet Union, and in India, as well as in the pan-Africanist and African-American traditions, adapting to these specific regional and political conditions in different ways. Marxist historiography has made contributions to the history of the working class, and the methodology of a history from below.

A parvenu is a person who is a relative newcomer to a high-ranking socioeconomic class. The word is borrowed from the French language; it is the past participle of the verb parvenir (to reach, to arrive, to manage to do something).

The French nobility (French: la noblesse française) was an aristocratic social class in France from the Middle Ages until its abolition on 23 June 1790 during the French Revolution.

From 1808 to 1815 during the First Empire the Emperor Napoléon bestowed titles that were recognized as a new nobility by the Charter of 4 June 1814 granted by King Louis XVIII.

Varna (Sanskrit: वर्ण, romanized: varṇa, Hindi pronunciation: ['ʋəɾɳə]), in the context of Hinduism, refers to a social class within a hierarchical traditional Hindu society. The ideology of varna is epitomized in texts like Manusmriti, which describes and ranks four varnas, and prescribes their occupations, requirements and duties, or Dharma.

• Brahmins: Vedic scholars, priests or teachers.
• Kshatriyas: Rulers, administrators or warriors.
• Vaishyas: Agriculturalists, farmers or merchants.
• Shudras: Artisans, labourers or servants.

This quadruple division is a form of social stratification, quite different from the more nuanced system of Jātis, which correspond to the term "caste".