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🔝Social Stratification

Causes of Social Stratification

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Why This Matters

Social stratification isn't random—it's produced and reproduced through specific mechanisms that sociologists have identified and studied for over a century. Understanding why inequality exists and how it perpetuates itself is central to the AP Sociology curriculum. You'll be tested on your ability to connect individual causes (like education or occupation) to broader structural patterns, and to explain how multiple factors intersect to create layered disadvantage or privilege.

The causes of stratification fall into distinct categories: ascribed characteristics (what you're born with), achieved characteristics (what you acquire), structural mechanisms (how institutions operate), and forms of capital (resources that can be converted into advantage). Don't just memorize a list of causes—know which category each belongs to and how they reinforce one another. That's what separates a 3 from a 5.


Ascribed Characteristics: What You're Born Into

These are statuses assigned at birth that individuals don't choose but that profoundly shape life chances. Ascribed characteristics operate through both direct discrimination and accumulated historical disadvantage.

Race and Ethnicity

  • Systemic discrimination—racial and ethnic minorities face institutional barriers in housing, employment, criminal justice, and healthcare that compound over time
  • Historical context shapes present inequality; colonization, slavery, and segregation created wealth gaps that persist across generations
  • Stereotypes and implicit bias operate within social institutions, affecting outcomes even when explicit discrimination is illegal

Gender and Sexism

  • Gender roles channel men and women into different occupations, with feminized work systematically undervalued and underpaid
  • Wage gaps persist even controlling for education and experience; women earn approximately 82 cents per dollar earned by men in comparable positions
  • Intersectionality—gender compounds with race, class, and other factors; women of color face multiplicative disadvantage

Age and Ageism

  • Life course positioning affects access to resources; both young workers and older adults face employment discrimination
  • Ageism manifests in hiring practices, workplace treatment, and assumptions about competence and productivity
  • Generational wealth transfer advantages those born into established families, while younger generations increasingly face barriers to wealth accumulation

Compare: Race vs. Gender as ascribed characteristics—both are assigned at birth and trigger discrimination, but they operate through different institutional mechanisms. Race is often tied to residential segregation and criminal justice disparities, while gender operates more through occupational sorting and domestic labor expectations. FRQs may ask you to analyze how these intersect.


Achieved Characteristics: What You Acquire

These are statuses individuals attain through effort and choice—though access to achievement is itself stratified. The "achieved" nature of these characteristics often masks how ascribed factors shape who can achieve them.

Education and Access to Knowledge

  • Primary mechanism of social mobility—educational attainment is the strongest predictor of occupational status and income in modern societies
  • Unequal access to quality education reproduces stratification; school funding tied to property taxes creates resource disparities along class and racial lines
  • Credentialism increasingly requires degrees for jobs that previously didn't need them, creating barriers for those without access to higher education

Occupation and Job Status

  • Occupational prestige hierarchies rank jobs by social standing, income, and autonomy; these rankings are remarkably consistent across cultures
  • Dual labor market theory—primary sector jobs offer security and advancement while secondary sector jobs offer neither, and movement between sectors is limited
  • Job status shapes identity and determines access to benefits like healthcare, retirement plans, and professional networks

Compare: Education vs. Occupation—both are "achieved" statuses, but education is increasingly necessary to access high-status occupations. The key distinction: education is the pathway, occupation is the outcome. Know that sociologists debate whether education creates human capital or simply signals existing advantages.


Economic Mechanisms: How Wealth Concentrates

These causes relate to how economic resources are distributed and transmitted. Economic stratification operates through both market mechanisms and intergenerational transfer.

Social Class and Economic Inequality

  • Multidimensional concept—class combines income (flow of money), wealth (accumulated assets), education, and occupation into a composite status
  • Income inequality has grown dramatically since the 1970s; the Gini coefficient measures this distribution and enables cross-national comparison
  • Poverty cycles emerge when low income prevents investment in education, health, and housing, limiting future earning potential

Wealth Accumulation and Inheritance

  • Wealth vs. income distinction is critical—wealth (assets minus debts) is far more unequally distributed than income and more predictive of life chances
  • Intergenerational transmission through inheritance, gifts, and investments in children's education creates cumulative advantage across generations
  • Racial wealth gap—median white family wealth is approximately 8 times median Black family wealth, reflecting centuries of discriminatory policy

Compare: Income vs. Wealth inequality—income is what you earn, wealth is what you own. Wealth inequality is more extreme and more persistent because wealth generates passive income and can be inherited. If an FRQ asks about persistent inequality, wealth accumulation is your strongest example.


Structural Power: Who Makes the Rules

These causes focus on how power operates through institutions and political systems. Stratification is maintained not just through individual advantage but through control over rule-making itself.

Power and Political Influence

  • Power elite theory (C. Wright Mills)—a small group of interconnected leaders in government, military, and corporations make decisions affecting everyone
  • Political participation correlates with class; higher-income individuals vote more, donate more, and have greater access to representatives
  • Policy feedback—those with power shape policies that protect their advantages, creating institutional reproduction of inequality

Geographic Location and Urbanization

  • Spatial inequality—where you live determines access to jobs, schools, healthcare, and social services
  • Urban advantage provides economic opportunity but also produces inequality through gentrification, which displaces lower-income residents
  • Rural disadvantage includes limited infrastructure, fewer educational institutions, and economic dependence on declining industries

Compare: Power vs. Geography as structural causes—both operate above the individual level, but power works through political institutions while geography works through resource distribution. Rural poverty and urban poverty have different mechanisms but similar outcomes.


Forms of Capital: Resources Beyond Money

These causes highlight non-economic resources that can be converted into advantage. Bourdieu's capital theory explains how privilege reproduces itself even without direct economic transfer.

Cultural Capital and Social Networks

  • Cultural capital (Bourdieu) includes knowledge, skills, and dispositions valued by dominant institutions—knowing how to navigate college applications, job interviews, and professional settings
  • Social capital refers to resources accessed through relationships; who you know often matters more than what you know for job placement
  • Network effects compound advantage—elite social networks provide information, recommendations, and opportunities unavailable to outsiders

Compare: Cultural capital vs. Social capital—both are non-economic resources that convert to advantage, but cultural capital is embodied (in your knowledge and behavior) while social capital is relational (in your connections). Bourdieu argued cultural capital is harder to acquire because it requires early socialization.


Quick Reference Table

ConceptBest Examples
Ascribed characteristicsRace, gender, age, family of origin
Achieved characteristicsEducation, occupation, income
Economic mechanismsWealth accumulation, inheritance, income inequality
Structural powerPolitical influence, geographic location
Forms of capitalCultural capital, social networks
IntersectionalityRace + gender, class + geography
Intergenerational transmissionInheritance, educational investment, cultural capital
Institutional discriminationHousing policy, school funding, hiring practices

Self-Check Questions

  1. Which two causes of stratification are both "ascribed" characteristics but operate through different institutional mechanisms? How do they differ?

  2. Explain why sociologists distinguish between income inequality and wealth inequality. Which is more persistent, and why?

  3. Compare cultural capital and social capital. How does each contribute to the reproduction of stratification across generations?

  4. An FRQ asks you to explain how stratification persists even when explicit discrimination is illegal. Which three causes would you use, and how do they connect?

  5. How does geographic location function as both a cause and a consequence of social stratification? Provide examples of urban and rural mechanisms.