# Lecture 9: Social Stratification
## Introductory Sociology
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## Learning Objectives
By the end of this lecture, students will be able to:
1. Define social stratification and explain its key principles
2. Compare systems of stratification (caste, class, meritocracy)
3. Describe the class structure of the United States
4. Explain the causes and consequences of poverty
5. Apply theoretical perspectives to the analysis of stratification
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## Lecture Content
### I. What Is Social Stratification?
**Social stratification** is a system by which a society ranks categories of people in a hierarchy. Sociologists have identified several key principles of stratification. First, stratification is a trait of society, not just individuals. Second, it persists across generations through intergenerational transmission. Third, it is universal but variable in form across societies. Fourth, it involves both material inequality and beliefs about inequality (ideology).
Stratification operates along several dimensions. **Wealth** is the total value of assets minus debts. **Income** is money received through wages, investments, or other sources. **Power** is the ability to achieve one's goals despite resistance. **Prestige** is the respect and recognition associated with a social position. These dimensions are related but can vary independently.
### II. Systems of Stratification
**Slavery** is the most extreme form of stratification, in which some people are owned as property by others. It has existed in many societies throughout history, based on debt, conquest, or ascription, as with race-based slavery in the Americas.
A **caste system** is a rigid system of stratification based on ascribed status. Position is determined at birth and is generally fixed for life, with endogamy (marriage within one's caste) reinforcing the system. The traditional Indian caste system, with its categories of Brahmins, Kshatriyas, Vaishyas, Shudras, and Dalits, and apartheid South Africa are both examples of caste systems.
A **class system** is stratification based on both ascribed and achieved characteristics. More fluid than a caste system, it allows for social mobility, though position is influenced by birth and can change through education, occupation, and effort. The class system is the dominant form of stratification in modern industrial societies.
**Meritocracy** is an ideal system where position is based entirely on individual merit -- talent plus effort. No society is a pure meritocracy, and the belief in meritocracy can obscure structural barriers to achievement.
**Social mobility** is movement within or between strata. Upward mobility means rising to a higher social position, while downward mobility means falling to a lower one. Intragenerational mobility involves changes within a person's lifetime, and intergenerational mobility involves changes between generations. Structural mobility is mobility caused by changes in the economy, such as industrialization creating more white-collar jobs.
### III. The U.S. Class Structure
The **upper class** (approximately 1-5% of the population) includes the upper-upper class of "old money" with inherited wealth and social prestige, and the lower-upper class of "new money" with self-made wealth and high incomes. This class wields significant political and economic power.
The **upper-middle class** (approximately 15%) consists of professionals, managers, and business owners who are college-educated, often with advanced degrees, and enjoy comfortable incomes and significant cultural capital. The **lower-middle class** (approximately 30-35%) includes white-collar workers, small business owners, and semi-professionals with moderate incomes who value education and respectability.
The **working class** (approximately 30%) consists of blue-collar workers and service sector employees with less education and greater economic vulnerability. Their jobs often involve manual labor and are subject to economic fluctuations. The **lower class or the poor** (approximately 15-20%) includes the working poor, who are employed but earn poverty-level wages, and the underclass, who are chronically unemployed and dependent on public assistance. This group faces multiple disadvantages, including limited education, poor housing, and inadequate healthcare.
Wealth inequality in the United States is extreme and growing. The top 10% holds approximately 70% of all wealth, while the bottom 50% holds approximately 2%. The racial wealth gap is stark: median white family wealth is roughly ten times that of median Black family wealth.
A stacked bar chart showing U.S. wealth distribution. The chart has five horizontal segments representing quintiles of the population. The top quintile (wealthiest 20%) occupies approximately 80% of the bar's width, shown in dark blue. The fourth quintile occupies about 10%. The third quintile about 5%. The second quintile about 3%. The bottom quintile (poorest 20%) occupies a sliver close to 0% or negative net worth, shown in red. A separate inset zooms into the top quintile, showing that the top 1% alone holds more than the bottom 90% combined. A caption reads: "Wealth inequality in the United States: the distribution is far more unequal than most Americans realize."
### IV. Poverty
**Absolute poverty** is a condition in which people lack the basic necessities for survival, including food, shelter, and clean water. It is more common in developing nations. **Relative poverty** is a condition in which people lack resources compared to the standard of living in their society, and it is more relevant in wealthy nations. The U.S. federal poverty line is based on the cost of a minimal diet multiplied by three and has been widely criticized as too low and outdated.
Who is poor in America? Children are the age group most likely to live in poverty. Women are more likely than men to be poor, a pattern known as the feminization of poverty. Racial and ethnic minorities are disproportionately poor. Single-parent families, especially those headed by women, people with less education, and rural and inner-city residents all face elevated poverty rates.
The causes of poverty are understood differently depending on perspective. **Individualistic explanations** attribute poverty to individual failings such as lack of effort or poor choices. Oscar Lewis's culture of poverty thesis argued that poverty is perpetuated by a distinctive set of values and behaviors, though this has been criticized for blaming the victim. **Structural explanations** point to social structural factors including the lack of good-paying jobs, inadequate education, discrimination, and deindustrialization. These structural barriers limit opportunities regardless of individual effort.
The consequences of poverty are far-reaching: poor health outcomes including higher rates of chronic disease and lower life expectancy, limited educational opportunities, inadequate housing and homelessness, higher exposure to crime and violence, and psychological stress and reduced well-being.
### V. Theoretical Perspectives on Stratification
The **structural functionalist Davis-Moore thesis** argues that social stratification is universal because it serves a vital function. The most important positions must be filled by the most qualified people, and high rewards in income and prestige are necessary to motivate talented individuals to undergo training and fill demanding positions. Critics note that this thesis does not explain why some highly functional jobs like teaching and nursing are poorly paid, ignores barriers to mobility, and effectively justifies inequality.
**Conflict theory** draws on both Marx and Weber. Marx argued that stratification results from exploitation, with the bourgeoisie exploiting the proletariat. Class consciousness is awareness of one's class position and interests, while false consciousness is acceptance of the ideology that legitimizes inequality. Weber offered a more nuanced, multidimensional model in which stratification operates along three independent dimensions: class, status, and party (power). Modern conflict theory emphasizes that stratification serves the interests of the powerful and that ideology and institutions work together to maintain inequality.
**Symbolic interactionism** focuses on how class is displayed, perceived, and experienced in everyday interactions. Thorstein Veblen's concept of conspicuous consumption describes the display of wealth to signal status. Pierre Bourdieu's concept of cultural capital refers to the knowledge, tastes, and cultural competencies associated with the upper classes. Interactionists examine how people "read" class cues in clothing, speech, manners, and tastes.
A diagram comparing Marx's and Weber's models of stratification. Panel A (Marx): A vertical bar divided into two sections -- the top (small) section labeled "Bourgeoisie (owners of means of production)" and the bottom (large) section labeled "Proletariat (workers who sell their labor)." A thick arrow between them is labeled "Exploitation and class conflict." Panel B (Weber): Three vertical bars side by side. Bar 1: "Class" (economic position based on market situation). Bar 2: "Status" (social prestige and honor). Bar 3: "Party/Power" (political influence and organizational affiliation). A caption reads: "Weber expanded on Marx by arguing that stratification is multidimensional, not reducible to economics alone." Arrows show that the three dimensions are related but can vary independently.
### VI. Social Class and Health
Social class is one of the strongest predictors of health outcomes. The social gradient in health shows that health improves at each step up the socioeconomic ladder -- this is not just a matter of poverty versus affluence but a continuous gradient. The mechanisms linking class and health include access to healthcare and insurance, quality of housing and neighborhoods, nutrition and food access (with food deserts limiting healthy options), exposure to environmental hazards, occupational risks, health behaviors influenced by stress, education, and resources, and chronic stress from economic insecurity. For pre-medical students, understanding how social class shapes patient health is essential for effective medical practice.
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