Social stratification is the structured and relatively enduring division of society into layers or positions that differ in access to valued resources, opportunities, power, prestige and social rewards. These layers can be organised around economic class, social status, political authority, occupational position, education, gender, ethnicity, caste or combinations of several dimensions. Stratification differs from simple individual difference because it involves patterned inequalities that are socially recognised, institutionally reproduced and often transmitted across generations.
The concept is used to analyse who receives particular advantages, how those advantages are distributed and why unequal positions persist. Stratification can exist even where societies formally endorse equality because differences in wealth, authority, social recognition or institutional access may continue through economic structures and social practices. Sociologists therefore study both the distribution of resources and the mechanisms that produce and maintain unequal social positions.
Karl Marx and Max Weber provided two highly influential but different approaches to social stratification. Marx placed class relations at the centre of his analysis and connected class divisions to ownership and control of productive resources. In a simplified Marxian framework, those who own productive property occupy a different structural position from those who depend primarily on selling their labour. Weber developed a multidimensional approach in which class was related to economic position but distinguished from status and party.
Class concerned market position and economic opportunities, status concerned social honour or prestige, and party concerned organised power. Weber's approach demonstrated that people can possess high prestige without equivalent wealth or political authority and that economic, cultural and political inequalities can intersect without perfectly overlapping.
Stratification can be open or closed to different degrees. In relatively open systems, movement between social positions is possible and social mobility may occur through education, occupational achievement, migration, marriage, entrepreneurship or other processes. In more closed systems, social positions are strongly inherited and movement between groups is restricted. Caste systems are often discussed as examples of highly structured hereditary stratification, although specific caste arrangements vary historically and geographically.
Class systems generally allow more mobility than caste systems, but this does not mean that class positions are determined entirely by individual achievement. Family wealth, education, social networks, neighbourhood conditions and institutional discrimination can influence opportunities. The distinction between open and closed systems therefore concerns the degree and mechanisms of mobility rather than a simple division between societies where mobility exists and societies where it does not.
Social stratification involves several dimensions that cannot always be reduced to income. Wealth refers to accumulated assets and financial resources, while income refers to resources received over a period. Power concerns the capacity to influence decisions or obtain desired outcomes, and prestige concerns socially recognised respect or honour. Education can provide qualifications and access to occupational opportunities, while occupation itself can confer income, authority and status. These dimensions can overlap but can also diverge. A highly paid occupation may carry substantial prestige, while some occupations with considerable social importance may receive relatively modest financial rewards. Sociologists therefore distinguish different forms of inequality rather than assuming that one ranking captures every aspect of social position.
Stratification is reproduced through institutions and social processes. Families can transmit wealth, education, cultural knowledge and networks across generations. Schools can distribute credentials and opportunities unevenly, while labour markets reward particular qualifications and skills. Housing markets influence access to neighbourhoods with different educational, environmental and social resources. Political institutions can determine rights, taxation and access to public resources. Social networks can provide information and opportunities that are unavailable to people outside particular circles. These mechanisms mean that stratification can persist even without explicit rules requiring children to occupy the same position as their parents. Intergenerational transmission can occur through accumulated advantages and disadvantages that shape opportunities throughout the life course.
Social mobility is an important concept in analysing stratification. Vertical mobility involves movement up or down a hierarchy, while horizontal mobility refers to movement between positions without a major change in relative rank. Intergenerational mobility compares social positions between parents and children, while intragenerational mobility examines changes within an individual's lifetime. Absolute mobility can occur when the occupational structure itself changes, whereas relative mobility concerns the chances of people from different social origins reaching particular positions compared with one another. A society can therefore experience considerable occupational change without necessarily becoming more socially mobile if access to desirable positions remains strongly associated with family background. Mobility analysis consequently requires attention to both structural change and unequal opportunities.
Stratification also has important consequences for health, education, housing, employment, political participation and life expectancy. People in different social positions can encounter different levels of exposure to hazards, access to resources and capacity to respond to risks. Educational opportunities can influence later employment and income, while income and wealth can affect housing quality and health. These relationships can create cumulative advantage or disadvantage, whereby early differences become amplified over time. Stratification is therefore not simply a ranking system. It can shape the material conditions under which people live, the choices available to them and their expectations about the future. Researchers must nevertheless distinguish statistical association from causal explanation because inequalities can have multiple interacting causes.
Contemporary sociology treats social stratification as a multidimensional and historically variable process. Class remains important, but researchers increasingly examine its interaction with gender, ethnicity, age, disability, migration status and other forms of social differentiation. Intersectional analysis asks how several dimensions of position combine to produce particular opportunities and constraints. Comparative research also demonstrates that stratification systems vary between societies and change over time.
The concept remains essential because it provides a systematic way to study patterned inequality rather than treating unequal outcomes as isolated individual differences. Understanding social stratification involves identifying the valued resources being distributed, the groups or positions between which they are distributed, the institutions reproducing the distribution, the degree of mobility available and the historical processes through which the hierarchy has developed.
