Understanding Social Mobility: Definitions and Class Systems

Where you are born, who your parents are, and what class you belong to – these facts shape life chances more than most people realize. Social mobility is the concept that captures whether and how much those starting conditions can change. It refers to the movement of individuals or groups within a society’s social stratification system – the hierarchical layers defined by wealth, occupation, education, and prestige. Understanding social mobility matters because it tells us whether a society rewards effort and talent, or simply reproduces the advantages of the privileged. The answer depends heavily on what kind of class system a society operates.

What social mobility actually means
Open and closed class systems
Open class systems
Closed class systems
Horizontal and vertical mobility
Horizontal mobility
Vertical mobility
Inter-generational and intra-generational mobility
Inter-generational mobility
Intra-generational mobility
The role of education in social mobility

Social mobility is the movement of individuals or groups in social position over time. It may refer to shifts in income, occupational status, educational attainment, or class membership – and it can move in either direction. A factory worker’s child who becomes a surgeon has moved upward; a once-wealthy family that loses its fortune has moved downward. Both are forms of social mobility.

The sociologist Pitirim Sorokin is credited with classically defining social mobility as movement across the social structure. Wallace and Wallace describe it simply as the movement of a person or persons from one social status to another. What both definitions share is the idea that position in a stratification system is not necessarily fixed – though how fixed it is depends entirely on the type of society in question.

Sociologists also point out that mobility is not as common or straightforward as popular culture suggests. The “rags to riches” narrative is inspiring, but relative to the overall population, the number of people who rise dramatically from poverty to wealth is very small. This is why examining the structural conditions that shape mobility – particularly open versus closed class systems – is so essential.

Open and closed class systems

The most fundamental distinction in the sociology of social mobility is between open and closed stratification systems. These two types differ in one critical way: how much a person’s birth determines their social fate.

Open class systems

In an open class system, people are ranked by achieved status – the social standing they earn through education, occupation, skills, and personal effort. Family background still plays a role, but it is not the final word. There is no fixed boundary between classes, and individuals can move up or down through the hierarchy. Open systems are characterized by occupational diversity, a flexible hierarchy, and an emphasis on individual freedom and equality as cultural values. Modern industrialized nations like the United States, the United Kingdom, and most of Western Europe operate primarily as open class systems, at least in formal terms.

A key feature of open systems is the possibility of meritocracy – where social position is determined by ability and achievement rather than birth. In practice, truly meritocratic societies are rare, but the ideal shapes how open-system societies justify inequality and reward success.

Closed class systems

Closed systems accommodate little change in social position. They do not allow people to shift levels and do not permit social relationships between levels. In these systems, a person’s social position is determined by ascribed status – characteristics assigned at birth, such as family lineage, caste, race, or ethnicity. No amount of personal effort or talent is sufficient to overcome these inherited barriers.

The major examples of closed systems are slavery, estate systems, and caste systems. Slavery is the most extreme form: the lowest group has absolutely no control over their social standing and no access to resources or rights. The transatlantic slave trade between the 1500s and 1800s is one of history’s most devastating examples. Caste systems, historically seen most prominently in India, assign people to social ranks at birth based on religious and cultural tradition. In the Hindu caste tradition, occupation and marriage partner were both caste-determined, and people in lower castes lived in abject poverty throughout their lives. Although India’s caste system has been officially dismantled at the constitutional level, its social residue persists – particularly in rural areas. Estate systems, characteristic of feudal Europe, similarly divided society into clergy, nobility, and commoners, with birth determining which tier a person occupied.

In closed systems, even highly educated or talented individuals may face insurmountable obstacles. Social mobility is restricted not by lack of ability but by the rigid ideology that treats inherited identity as destiny.

Horizontal and vertical mobility

Within any class system – open or closed – sociologists distinguish between different directions of movement. These are captured by the concepts of horizontal and vertical mobility.

Horizontal mobility

Horizontal mobility involves a change in occupation, location, or social role without a corresponding change in social rank. A teacher who moves from one school to another, or a nurse who switches hospitals, has moved horizontally – their status within the social hierarchy remains broadly the same. This type of movement can involve significant personal change without altering a person’s class position.

Vertical mobility

Vertical mobility is what most people mean when they talk about social mobility. It involves a person’s occupational status or social class moving either upward or downward. Upward vertical mobility – moving from a lower to a higher class position – is what the “American Dream” narrative celebrates. Downward mobility, less discussed but equally real, occurs when someone’s class position declines due to job loss, economic crisis, or other circumstances.

It is worth noting that vertical mobility is not always the result of individual effort. Structural mobility occurs when broad societal changes – industrialization, technological shifts, economic booms or recessions – enable or force large groups of people to move up or down the social ladder simultaneously. Structural mobility is attributable to changes in society as a whole, not individual changes. For instance, the rise of white-collar work in the 20th century created new occupational categories that drew workers upward from manual labor on a wide scale.

Inter-generational and intra-generational mobility

Sociologists also distinguish mobility by its timeframe – specifically, whether it is measured within a single lifetime or across generations.

Inter-generational mobility

Inter-generational mobility refers to differences in social class between parents and their children. It captures the relationship between the socio-economic status of parents and the status their children will attain as adults. A society is considered more mobile when this relationship is looser – meaning a child’s future is less determined by where they started. An upper-class executive who grew up in a working-class home illustrates upward inter-generational mobility; patterns across multiple generations can reveal long-term trends in how opportunity is distributed.

Research by the OECD confirms that public policies such as education and early childcare play a role in explaining observed differences in inter-generational mobility across countries, with Scandinavian nations consistently showing higher levels of mobility than the United States or the United Kingdom.

Intra-generational mobility

Intra-generational mobility describes changes in an individual’s social position within their own lifetime. It highlights how a person’s circumstances – such as education and employment opportunities – can shift over time, impacting their social standing and quality of life. A young person from a working-class background who completes a university degree and moves into a professional role has experienced upward intra-generational mobility. Career progression, entrepreneurship, economic conditions, and personal decisions all contribute to this type of movement.

Importantly, intra-generational mobility is also influenced by structural forces beyond individual control. Rising inequality appears to have strengthened the relationship between parents’ socioeconomic status and children’s scholastic achievement, making the path of intra-generational mobility steeper for those who start at the bottom.

Education is widely regarded as the primary vehicle for upward mobility in open class systems. It provides individuals with credentials, skills, and social networks that improve access to better-paying occupations and higher social positions. Higher education policies have worked to establish and reinforce stratification, with gaps in quality between elite and standard universities contributing to unequal outcomes across class lines.

The relationship between education and mobility is, however, more complicated than it first appears. Children from wealthier families typically have access to better schooling, private tutoring, and extracurricular resources that give them a competitive edge – advantages that compound over time. Meanwhile, children from poorer backgrounds face barriers to quality education that limit their upward movement. Children whose parents are upwardly mobile gain higher educational qualifications than their peers in their class of origin, but obtain lower qualifications than their peers in their class of destination – a finding that reveals how class mobility and educational attainment are deeply intertwined across generations.

In closed class systems, education’s role is even more constrained. Even well-educated individuals in caste-based societies may find their professional advancement blocked by entrenched social identities that no qualification can fully override. As the EBSCO Research Starters note, upward movement is often dependent on both knowledge of and access to resources such as educational credentials, job training programs, and professional networks – resources that are themselves unequally distributed.

Some researchers go further. A major study by Bukodi and Goldthorpe on social mobility in Britain argues that education alone is not the key determinant of adult labor market success, and that improving educational attainment among children from poor backgrounds does not straightforwardly improve their outcomes. This suggests that addressing mobility requires systemic interventions beyond schooling – including policies targeting poverty, housing, healthcare, and workplace discrimination.

What education can do is shift the odds. In societies with accessible, equitably funded public education – like those of Scandinavia – inter-generational mobility is measurably higher. Where educational quality is sharply unequal, the system can end up reinforcing the very hierarchies it is meant to disrupt.

What do you think? If open class systems formally allow mobility yet structural barriers still limit it for many people, how meaningful is the distinction between “open” and “closed” systems in practice? And if education alone cannot guarantee upward mobility, what other structural changes would genuinely level the playing field?

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Table of Contents

What social mobility actually means 🔗

Open and closed class systems 🔗

Open class systems 🔗

Closed class systems 🔗

Horizontal and vertical mobility 🔗

Horizontal mobility 🔗

Vertical mobility 🔗

Inter-generational and intra-generational mobility 🔗

Inter-generational mobility 🔗

Intra-generational mobility 🔗

The role of education in social mobility 🔗

References

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Sociology of Education

What social mobility actually means