Social class shapes wealth, health, education, and life expectancy. The MCAT tests it within the framework of social inequality: recognizing the sociological theories, key thinkers, and mechanisms behind stratification. This guide moves from what stratification is, to how it reproduces itself, to how it affects health and mobility, and finally the vocabulary to know cold.
Priority labels: Must know = cold; Know the logic = mechanism not names; Passage-level = recognize, don't memorize; Optional = skippable.
Aspects of Social Stratification
Must knowSocial stratification is the hierarchical ranking of individuals and groups by unequal access to resources, opportunities, and rewards. The key insight: it is a structural, institutionalized feature of society that persists across time — not random inequality.
Weber's three dimensions. Max Weber argued inequality operates through three semi-independent dimensions:
- Class — economic position (wealth, income)
- Status (prestige) — social honor and esteem granted by others
- Party (power) — ability to achieve goals despite resistance, often via political organization
This matters because rankings don't always line up: a lottery winner has high class but may have low status; a senator from a modest background has high power but moderate class.
Stratification systems differ in how open or closed they are:
- Caste systems are closed — rank is ascribed at birth, movement nearly impossible (e.g., historical Indian caste system).
- Class systems are theoretically open — rank is partly achieved through effort, education, and talent.
Davis-Moore thesis (functionalist): Davis and Moore argued stratification is functional — inequality motivates talented people to fill important roles requiring long training. Conflict theorists counter that it justifies existing inequality and ignores how birth privilege, not talent, drives outcomes.
Marx (conflict theory): class is defined by relationship to the means of production, dividing capitalist society into the bourgeoisie (owners) and proletariat (workers who sell their labor); the bourgeoisie exploit the proletariat to extract surplus value.
Passage-levelSymbolic interactionism examines class at the micro level, as performed and signaled through status symbols and consumption. Conspicuous consumption (Veblen) is displaying expensive goods/leisure to signal status rather than meet a practical need.
Quick check: A society where your social rank is determined entirely by which family you were born into and cannot be changed is best described as what type of stratification system? Answer: A closed/caste system, because rank is fully ascribed rather than achieved.
Social Class and Socioeconomic Status
Must knowSocial class is a person's overall position in the stratification hierarchy; socioeconomic status (SES) is the measurable version — a composite of income, education, and occupation (wealth is also a key indicator). The MCAT uses the terms nearly interchangeably.
The distinction that matters most: income is a flow (wages received over time), while wealth is accumulated assets minus liabilities (net worth). Wealth is far more unequally distributed than income. These variables cluster but don't always align — a retired physician may have high wealth but no current income; a grad student has high education but low income.
The working class differs from the middle class by type of labor (manual/service vs. professional) and by lacking a financial safety net even when employed.
Quick check: Two neighbors earn the same annual salary. Neighbor A has $500,000 in home equity and investments; Neighbor B rents and has no savings. Who has higher wealth? Answer: Neighbor A — wealth is about accumulated assets, not current income.
Class Consciousness and False Consciousness
Must knowClass consciousness is members of a class recognizing their shared identity, interests, and position; Marx believed the proletariat would develop it and organize against the bourgeoisie. False consciousness (Marx/Engels) is the opposite: a distorted understanding of one's own class interests, shaped by ruling-class ideology that makes the existing order seem natural and fair.
Example: a worker who opposes unions because she believes she'll one day own a business — despite low odds — acts under false consciousness; the ideology of individualism obscures her structural position.
Quick check: A coal miner strongly identifies with the company that employs him, opposes worker strikes, and votes against minimum wage increases. Which concept does this best illustrate? Answer: False consciousness — his understanding of his interests does not align with his structural class position as a worker.
Cultural Capital and Social Capital
Must knowBourdieu's capitals. French sociologist Pierre Bourdieu showed stratification reproduces itself beyond money via three forms of capital:
- Economic capital — financial resources (money, property)
- Cultural capital — non-financial assets that confer advantage: knowledge, behaviors, tastes, credentials, familiarity with dominant norms
- Social capital — resources from relationships and networks — who you know
The insight: elite children are socialized into the cultural codes of the dominant class. Knowing how to interact with teachers, use formal vocabulary, or discuss classical music gives them advantages before money even comes into play.
OptionalCultural capital has three forms: embodied (internalized manners/dispositions), objectified (cultural goods like books/art), institutionalized (credentials/degrees).
Habitus (Bourdieu) is the durable system of dispositions acquired through socialization — your "second nature," the intuitive sense of what is normal or appropriate, shaped by class background. A working-class student at an elite university may feel they don't quite fit in — their habitus was formed elsewhere.
Social capital opens doors money can't buy directly: the student whose parent golfs with the firm's partner gets the interview.
Quick check: A first-generation college student has strong grades but struggles to connect with professors, doesn't know to attend office hours, and is unfamiliar with the norms of professional networking events. Which of Bourdieu's concepts best explains their disadvantage? Answer: Cultural capital (specifically embodied cultural capital) — they lack the internalized behaviors and knowledge of the dominant class that ease navigation of academic and professional institutions.
Social Reproduction
Must knowSocial reproduction (Bourdieu) is the process by which inequalities transmit across generations — how the class structure perpetuates itself. Wealthy parents transmit economic capital directly (inheritance), cultural capital indirectly (socialization, language, values), and social capital through networks.
Education is the primary institutional mechanism: schools reward the dominant class's cultural capital, so students who already know the "rules of the game" (formal language, comfort with authority) are advantaged in a system that treats these as natural talent. Unlike simple inheritance, social reproduction explains how inequality is legitimized — made to look like individual merit rather than structural advantage.
Quick check: A child of two physicians grows up hearing sophisticated vocabulary, visiting museums, and attending enriching summer programs. She performs well on standardized tests and gains admission to a top university. Which concept best describes how her class position is being maintained across generations? Answer: Social reproduction — advantages in cultural capital and access translate into educational success, which perpetuates class position.
Power, Privilege, and Prestige
Must know- Power — ability to achieve goals and influence others despite resistance (Weber); built into institutions (employer over employee).
- Privilege — unearned advantages from membership in a dominant group, often invisible to those who have it (it operates as the absence of barriers). Examples: white, class, male privilege. It does not mean no hardship — it means one's group identity isn't a source of systematic disadvantage. (theorized by Peggy McIntosh)
- Prestige — social honor and esteem granted by others; occupations have measurable prestige rankings (physicians rank high). Esteem, not coercive capacity.
The interplay matters: a community organizer may have local power but low prestige; a celebrity has prestige but little formal power; a CEO has all three.
Quick check: A white woman applying for a job does not have to worry that her name will cause her résumé to be automatically screened out due to racial bias. Which concept best describes this? Answer: Privilege — specifically racial privilege, an unearned advantage her racial identity confers by the absence of a specific structural barrier.
Intersectionality
Must knowIntersectionality (Kimberlé Crenshaw, 1989) describes how identity categories — race, gender, class, age, etc. — do not act independently but intersect to create unique, emergent experiences of advantage or disadvantage that can't be understood dimension-by-dimension.
Crenshaw's classic example: Black women's workplace discrimination was not simply "race + gender" — it was a unique form not captured by analyzing white women (gender) or Black men (race) separately. The key word is emergent, not additive: a low-income elderly woman of color faces compounding disadvantages qualitatively different from what any single dimension predicts.
Quick check: Researchers find that Black women have higher rates of maternal mortality than white women, even at equivalent income levels. What concept explains why analyzing race alone or income alone fails to capture this pattern? Answer: Intersectionality — the interaction of race and gender creates a unique risk profile that neither dimension predicts independently.
Socioeconomic Gradient in Health
Must knowHealth follows a socioeconomic gradient: at every step up the SES ladder, people are healthier and live longer — a continuous gradient, not just poor-vs-everyone-else.
The landmark evidence is the Whitehall Studies (Marmot, from 1967), which followed British civil servants — all employed, insured, none in poverty — and found a steep gradient: even senior vs. middle administrators differed. This shows relative position matters, not just absolute deprivation.
Know the logicWhy lower SES → worse health:
- Material deprivation — less access to nutritious food, safe housing, healthcare
- Psychosocial stress — chronic stress from insecurity, discrimination, and low control activates the HPA axis, raising cortisol and producing allostatic load (cumulative physiological wear from chronic stress)
- Health behaviors — higher smoking, poorer diet, partly because healthy options cost more
- Healthcare access and environmental exposures (pollution, lead) compound the rest
Health disparities — systematic, avoidable differences between groups — tie SES to intersectionality: racial disparities run partly through SES (segregation → worse neighborhoods) and partly through independent pathways like discrimination stress.
Quick check: Two patients have the same income, but one has held the same stable job for 20 years while the other has experienced repeated unemployment. Which concept explains why the second patient might show worse health outcomes even at the same income level? Answer: Psychosocial stress / allostatic load — chronic stress from job insecurity activates stress hormones over time, producing cumulative physiological damage independent of current income.
Global Inequalities
Know the logicStratification exists between nations too. Global stratification ranks entire nations by wealth, power, and resources.
World Systems Theory (Wallerstein) divides the world into:
- Core nations — wealthy, industrialized, dominate trade and extract resources (e.g., USA, Germany)
- Peripheral nations — poor, provide raw materials and cheap labor, dependent on the core
- Semi-peripheral nations — in between (e.g., Brazil, India), exploited by the core while exploiting the periphery
Dependency theory (Frank) similarly argues wealthy nations actively underdeveloped poor ones through colonialism, creating ongoing dependency. The optimistic counterpoint is modernization theory (Rostow's stages of growth): poor nations are simply developmentally "behind" and can catch up internally. The MCAT contrasts this (poverty = a lag nations overcome) with dependency/world-systems (poverty = actively produced by exploitation).
The global health gradient mirrors the domestic one: lower-income nations have higher infectious disease, maternal/child mortality, and lower life expectancy.
Quick check: A multinational corporation sets up factories in a peripheral nation, pays very low wages, and exports profits to its core-nation headquarters. Which theory best frames this relationship? Answer: World Systems Theory (Wallerstein) — the peripheral nation provides cheap labor while the core nation captures the economic surplus.
Patterns of Social Mobility
Must knowKnow the types of mobility. Social mobility is movement within the stratification hierarchy.
Intergenerational vs. Intragenerational
Must know- Intergenerational — change between generations (child vs. parent). Example: a coal miner's daughter becomes a physician. Most common MCAT framing.
- Intragenerational — change within one lifetime (career mobility). Example: a retail clerk gets a degree and becomes a manager.
Vertical vs. Horizontal
Must know- Vertical — movement up or down in rank (janitor → accountant; or downward).
- Horizontal — movement across equivalent ranks without changing standing (teacher in Ohio → teacher in California).
These two dimensions are independent (either type can be vertical or horizontal). Structural mobility is caused by economy-wide shifts rather than effort — when an industry grows (e.g., tech), many move up simply because more high-status jobs exist.
Quick check: A woman works as a nurse for 30 years and retires at the same income level at which she began her career. Her daughter becomes a physician. Identify the type of mobility illustrated by each. Answer: The mother shows intragenerational horizontal (or no) mobility — same position throughout her career. The daughter shows upward intergenerational vertical mobility — higher class position than her parent.
Meritocracy
Must knowMeritocracy is a system in which rewards are allocated by individual merit — talent, effort, achievement. The term was coined satirically by Michael Young (1958).
Know the logicMeritocracy functions as an ideology that legitimizes inequality: if success follows merit, those at the top deserve it and those at the bottom didn't try — reinforcing false consciousness. But people don't start equal: cultural capital, social capital, and inherited wealth shape "merit" as measured by test scores and credentials. The MCAT's point isn't that effort never matters, but that effort alone doesn't explain outcomes.
Quick check: A student from a wealthy family attends private school, receives tutoring, and scores in the 99th percentile on standardized tests, gaining admission to an elite university. Proponents of meritocracy would say she earned her spot through talent. A sociologist citing Bourdieu would add what? Answer: That her score reflects substantial cultural capital advantages conferred by class, not purely innate talent or individual effort — the "merit" is partly a product of structural advantage.
Poverty
Must knowPoverty is lacking resources to meet basic needs. The MCAT distinguishes two measures.
- Absolute poverty — a fixed threshold for basic survival (food, shelter), regardless of others. The World Bank's extreme-poverty line is an example.
- Relative poverty — defined relative to a society's median standard; you can meet survival needs yet be unable to participate normally (no internet, no car in a car-dependent city). Absolute poverty can fall globally while relative poverty in wealthy nations stays high.
Feminization of poverty — the disproportionate representation of women, especially single mothers, among the poor (wage gaps, childcare costs, divorce). The poverty trap/cycle — poverty self-perpetuates (worse nutrition, schools, health → harder to escape), a macro-level form of social reproduction.
Know the logicThe culture-of-poverty thesis (Oscar Lewis) locates the cause partly within the poor — sustained poverty breeds self-perpetuating values. Structural explanations counter that external conditions (labor markets, discrimination, underfunded schools, segregation) produce it. The structural account is sociologically favored; culture-of-poverty is criticized as "blaming the victim."
Quick check: The United States defines its poverty line based on the income needed to afford a basic food basket multiplied by three (a fixed threshold). Which type of poverty does this measure? Answer: Absolute poverty — it's a fixed standard of material resources, not relative to median income.
Social Exclusion (Segregation and Isolation)
Must knowSocial exclusion is systematic marginalization from full participation in social, economic, and political life — broader than poverty alone. Two key forms:
Segregation — physical/social separation of groups, often by race or class. Residential segregation spatially encodes inequality: it concentrates poverty, limits access to (locally funded) quality schools, and reduces exposure to networks and role models. De jure = legally enforced (Jim Crow); de facto = occurring through economic/historical forces without legal mandate.
Isolation — lack of social ties and meaningful contact, geographic (rural elderly without transport) or social. Social isolation is a profound health risk, raising morbidity/mortality comparably to smoking, partly via HPA activation.
Poverty + segregation + isolation compound: worse than any single factor predicts.
Quick check: A low-income community is concentrated in a geographic area far from grocery stores, hospitals, and public transportation. Residents have limited contact with people outside their neighborhood. Identify the two forms of social exclusion present. Answer: Segregation (residential concentration by class/race, geographically isolated from resources) and isolation (limited social ties and connectivity to broader society).
Common Confusions & Tricks
Weber's three dimensions are separate, not interchangeable. Students conflate class, status, and power. Remember: a drug dealer may have high income (class) but low prestige (status) and no formal power; a beloved professor may have high status but modest class and limited power. Test questions often present someone whose three dimensions don't match — that's a clue Weber is being tested.
Class consciousness vs. false consciousness direction matters. Class consciousness = workers recognize their exploitation and shared interest. False consciousness = workers fail to recognize this and adopt the ideology of the ruling class. These are opposites — don't confuse them.
Intergenerational vs. intragenerational: "inter-" = between (generations), "intra-" = within (one lifetime). A useful trick: intergenerational is about your parent-to-you comparison; intragenerational is your career from start to finish.
Vertical = up or down in rank; horizontal = same level, different position. Students sometimes call any movement "vertical." A teacher who becomes a nurse has horizontal mobility (similar prestige and income). A teacher who becomes a hospital administrator has upward vertical mobility.
Absolute poverty has a fixed threshold; relative poverty is context-dependent. If you see the World Bank's international poverty line, that's absolute. If you see "below 60% of median income," that's relative.
Cultural capital ≠ social capital. Cultural capital is what you know and how you act (knowledge, behaviors, credentials). Social capital is who you know (relationships and networks). Both are Bourdieu. Don't swap them.
Bourdieu's habitus is not the same as culture. Habitus is the embodied, internalized set of dispositions that shapes perception and behavior — it's a deeply personal, almost unconscious second nature, not just knowledge of cultural norms.
Intersectionality is about emergent, interactive effects — not just adding up disadvantages. The MCAT may describe a scenario where the experience of a Black woman is not simply "Black experience + female experience." The intersection creates something qualitatively different.
Prestige ≠ power. A celebrity has prestige; a senator has power. A community with strong local leadership has power; it may have no national prestige.
The Whitehall Studies showed a gradient throughout the hierarchy, not just at the bottom. Don't say "the Whitehall Studies show that the poor have worse health." Say they show that every step up the hierarchy is associated with better health — even comparing middle to upper-middle ranks.
Meritocracy as a concept can be used neutrally (the system) or critically (the ideology that masks inequality). Know both uses — the MCAT tests both the definition and its sociological critique.
Key Theories & Terms
| Term / Theorist | What it means / Who they are |
|---|---|
| Social stratification | The hierarchical ranking of individuals/groups with unequal access to resources and rewards; a structural, persistent feature of society |
| Max Weber | German sociologist who proposed a three-dimensional model of stratification: class (economic), status (prestige), and party (power) |
| Karl Marx | Proposed a two-class model (bourgeoisie vs. proletariat) defined by relationship to means of production; foundational to conflict theory |
| Bourgeoisie | In Marxist theory, the capitalist class that owns the means of production |
| Proletariat | In Marxist theory, the working class that sells its labor to the bourgeoisie |
| Class consciousness | Workers' awareness of their shared class interests and position in the class structure (Marx) |
| False consciousness | Distorted understanding of one's own class interests, shaped by ruling-class ideology (Marx/Engels) |
| Socioeconomic status (SES) | Composite measure of social position based on income, wealth, and education |
| Pierre Bourdieu | French sociologist who developed the concepts of cultural capital, social capital, economic capital, habitus, and social reproduction |
| Cultural capital | Non-financial social assets (knowledge, behaviors, credentials, tastes) that confer advantage; exists in embodied, objectified, and institutionalized forms (Bourdieu) |
| Social capital | Resources derived from social networks and relationships — "who you know" (Bourdieu) |
| Habitus | The internalized, embodied system of dispositions acquired through socialization that shapes perception and action (Bourdieu) |
| Social reproduction | The processes by which social inequalities and class positions are transmitted across generations (Bourdieu) |
| Intersectionality | Framework for understanding how multiple identity dimensions (race, gender, class, age, etc.) interact to produce unique experiences of advantage/disadvantage; developed by Kimberlé Crenshaw |
| Kimberlé Crenshaw | Legal scholar who coined the term "intersectionality" (1989) to describe the compounding effects of overlapping social identities |
| Power | The ability to achieve goals and influence others despite resistance (Weber) |
| Privilege | Unearned advantages conferred by membership in socially dominant groups; often invisible to those who possess it; theorized by Peggy McIntosh |
| Prestige | Social honor and esteem granted to a person or position by others |
| Socioeconomic gradient in health | The continuous, stepwise relationship between SES and health outcomes — health improves at every step up the social hierarchy |
| Whitehall Studies | Landmark British studies (Marmot, starting 1967) showing a SES-health gradient even among employed civil servants — relative position matters |
| Michael Marmot | British epidemiologist who led the Whitehall Studies and documented the SES-health gradient |
| Allostatic load | Cumulative physiological wear from chronic stress (including that caused by low SES and discrimination), affecting multiple organ systems |
| World Systems Theory | Wallerstein's framework dividing the world into core, peripheral, and semi-peripheral nations based on economic dominance |
| Immanuel Wallerstein | Sociologist who developed World Systems Theory to explain global inequality |
| Dependency theory | Theory (Frank) that wealthy nations actively created and sustain underdevelopment in poor nations through colonial and economic domination |
| Modernization theory | Optimistic counterpoint (e.g., Rostow's stages of growth): poor nations are developmentally "behind" and can catch up by progressing through stages of industrial/cultural modernization |
| Conspicuous consumption | Veblen's symbolic-interactionist concept — displaying expensive goods/leisure to signal social status rather than to meet a practical need |
| Thorstein Veblen | Sociologist/economist who coined "conspicuous consumption" (The Theory of the Leisure Class, 1899) |
| Social mobility | Movement of individuals or groups within the stratification hierarchy |
| Intergenerational mobility | Change in class position between parent and child generations |
| Intragenerational mobility | Change in class position within a single person's lifetime (career mobility) |
| Vertical mobility | Movement up or down in the stratification hierarchy (change in rank) |
| Horizontal mobility | Movement between positions of equivalent rank — change in role without change in status |
| Structural mobility | Mobility resulting from shifts in the broader occupational/economic structure rather than individual effort |
| Meritocracy | A system in which rewards are allocated by individual talent and effort; coined satirically by Michael Young (1958) |
| Michael Young | British sociologist who coined "meritocracy" (1958) as a satirical critique, not an endorsement |
| Absolute poverty | Poverty defined by a fixed threshold of resources needed to meet basic survival needs |
| Relative poverty | Poverty defined relative to the median standard of living in a given society |
| Feminization of poverty | The disproportionate representation of women (especially single mothers) among the poor |
| Culture of poverty | Oscar Lewis's thesis that sustained poverty breeds self-perpetuating values/behaviors; criticized as "blaming the victim" and contrasted with structural explanations of poverty |
| Social exclusion | The systematic marginalization of individuals/groups from full participation in social, economic, and political life |
| Segregation | Physical or social separation of groups (de jure = legally mandated; de facto = occurring without legal mandate) |
| Social isolation | Lack of meaningful social ties and contact; independently associated with increased morbidity and mortality |
| Davis-Moore thesis | Functionalist argument (Davis & Moore) that stratification is socially necessary because inequality motivates talented individuals to fill important roles |
| Caste system | A closed stratification system in which rank is ascribed at birth and movement between levels is prohibited or nearly impossible |