Social Stratification and Global Inequality

This is Unit Six of Sociology, Part Two: why stratification persists, and then inequality between nations rather than inside one. Part One described the shape of inequality. This part explains it, and the explanations disagree. The functionalist thesis says unequal rewards are how a society gets its most demanding positions filled. The objections say reward tracks power rather than importance — and point out that work a society cannot function without is often among its least rewarded. Then the unit turns outward, and the measurement problem arrives with it. A national average income is a mean, and a mean conceals the distribution behind it. Two nations with identical averages can be nothing alike. Two theories then explain the gap between nations. One reads it as a difference in stage, the other as a difference in relationship. The course presents both at their strongest and settles neither. The unit closes with two households earning exactly the same wage, followed until they are not remotely comparable. By the end you will be able to do five things. One: state the Davis-Moore thesis and its objections. Two: say what the conflict and interactionist accounts add. Three: say what a Gini coefficient can and cannot tell you. Four: tell modernization from dependency theory. Five: name the three positions in world systems analysis.

Two entries, and they are best held together. The first is the standard functionalist explanation of why any society has inequality at all. The second is not a refutation of that question — it is an attack on the mechanism the thesis proposes, which is a narrower and sharper thing.

The thesis.

Soc 0857 The Davis-Moore Thesis

Stratification is functional because unequal rewards motivate the most capable people to fill the most demanding positions. Positions requiring long training carry higher rewards, which the thesis reads as the incentive that fills them. It explains why inequality exists and does not establish that its current size is necessary.

The objections.

Soc 0858 Objections to Davis-Moore

Critics answer that reward tracks power rather than functional importance, that many essential occupations are poorly paid, and that unequal starting points prevent the sorting the thesis assumes. Work a society cannot function without is often among its least rewarded. The objection targets the mechanism, not the existence of different positions.

Three entries. The conflict account explains persistence by looking at who wrote the rules of transmission. The interactionist account works at a much smaller scale — how position is signalled and read in a room — and the third entry gives the classic name for that signalling.

Who wrote the rules.

Soc 0860 Conflict Theory on Stratification

Stratification persists because those advantaged by it control the rules that reproduce it, from inheritance law to schooling. The arrangements determining who inherits and who is credentialed were themselves decided by someone. The claim concerns the reproduction of advantage, not the motives of any individual.

How it is read.

Soc 0862 Symbolic Interactionism on Stratification

Interactionists study how class is displayed and read in everyday life through speech, dress, consumption and manner, making position visible and enforceable. An accent or a brand communicates position before anyone states an income — and the markers are learned in childhood, which makes them difficult to acquire later.

The classic term.

Soc 0863 Conspicuous Consumption

Veblen's term for spending undertaken to display social position rather than to satisfy a need. A purchase whose visible cost is the point performs the same work at every income level. The display is not confined to the wealthy — the scale changes and the mechanism does not.

Four entries turning the unit outward. Two of them are measurement entries and they carry the caution: an average is a mean, a Gini is a summary, and both discard information you often need. The fourth entry then points out that even the names for groups of countries are arguments.

The same layering, worldwide.

Soc 0866 Global Stratification

The unequal distribution of resources and opportunity between nations, layering the world much as class layers a single society. Life expectancy, schooling and income differ more between countries than within most of them. Between-nation and within-nation inequality are distinct measures that can move in opposite directions.

How it is measured.

Soc 0867 Measuring Global Inequality

Global inequality is measured by national income per person, but averages conceal distribution, so a measure of spread is required alongside them. Two nations with identical average income can differ entirely in how that income is spread. Read a national average as a mean, and ask immediately for the distribution behind it.

The measure of spread.

Soc 0868 The Gini Coefficient

A single figure from zero, perfect equality, to one, where a single household receives all the income, comparing the actual distribution against the line perfect equality would trace. One number cannot say where in the distribution the inequality sits, and two societies can share a Gini and differ greatly.

Naming the groups.

Soc 0870 Classifying Nations

Nations are classified by income level and by position in the global economy, using categories that carry assumptions and are revised as economies change. A term such as "developing" implies a destination and a single path toward it. The classification chosen shapes the conclusion drawn, and none of them is neutral.

Two entries, and they are not two versions of one answer. One locates the cause inside a nation and the other locates it in the relationship between nations, which means they disagree about where to look before they disagree about anything else.

A difference in stage.

Soc 0872 Modernization Theory

Global inequality as a difference in stage: poorer nations advance by adopting the technology, institutions and practices of industrialised ones. On this account, low income reflects internal conditions a nation can change. Critics answer that it treats one historical path as the only route and overlooks colonial history.

A difference in relationship.

Soc 0873 Dependency Theory

Global inequality as a relationship rather than a stage: wealthy nations became wealthy partly through extraction from poorer ones. Trade terms and resource ownership set during colonial rule persisted after formal independence. Both theories are presented here at their strongest, and neither is adjudicated.

Two entries. The framework treats the world as one economy rather than as a collection of national ones — and the second entry explains why the arrangement is stable, which is the more interesting half.

One system.

Soc 0875 World Systems Analysis

Wallerstein's framework treats the world as one economic system divided into core, peripheral and semi-peripheral nations. Core nations concentrate capital and high-value production; peripheral nations supply labor and raw materials. The categories describe positions in a system, and nations do move between them.

The middle tier.

Soc 0876 Semi-Peripheral Nations

An intermediate position, exploited by core nations while extracting from peripheral ones. A nation can host advanced manufacturing while sourcing raw materials from poorer neighbors. The middle tier stabilises the system by giving some nations a stake in preserving it — a position defined by relations to both tiers, not a moral middle rank.

Three entries. Two mechanisms of persistence, one assigned to high-income nations and one to middle-income nations, and then what the whole arrangement costs measured in something other than money.

For high-income nations.

Soc 0878 Capital Flight and Deindustrialization

Capital flight is investment, jobs and infrastructure moving out of a nation, and the anchor treats deindustrialization as its direct consequence for high-income nations. A relocated factory takes its jobs and its tax base with it, and the region rarely replaces them quickly. This explains continuation rather than origin.

For middle-income nations.

Soc 0879 Debt Accumulation

Repayment obligations bind national budgets and constrain future spending. Servicing external debt can consume revenue that schooling and infrastructure would otherwise receive. The debt did not appear by accident — it followed decisions about borrowing terms made by lenders and governments.

What it costs.

Soc 0880 Consequences of Global Inequality

Global stratification appears most starkly in outcomes money cannot be separated from: life expectancy, child mortality, schooling completed, exposure to preventable disease. Where a person is born predicts these more strongly than anything they subsequently do. The gaps track resources and institutions, and no biological explanation accounts for them.

Two entries to close, both longer than what came before. The first is the sharpest demonstration in the course of how a rule that mentions nobody's income can sort by income anyway. The second follows two identical wages until they are not comparable at all.

One requirement, three questions.

Soc 0885 Stratification Through Three Lenses

A profession requiring an unpaid internship for entry. The functionalist asks what the requirement accomplishes: screening for commitment, transmitting practice, supplying labor during evaluation. The conflict theorist asks who can accept it — only candidates a family can support through unpaid months, which converts family wealth into professional entry while every stated criterion stays neutral. The interactionist asks how the room reads a candidate who lacks the markers learned at home. Nobody intended exclusion, and the profession is filtered regardless.

The capstone. Two households, identical income.

Soc 0890 Two Households

One rents and holds debt; the other owns its home outright and holds savings. On income identical, on wealth not comparable — and the gap widens without either household changing its conduct. Then six months of lost work: the first misses rent, damages its credit, relocates, and the relocation disrupts schooling. The second draws on savings. Identical bad luck moved one and left the other in place, and no income measure would have predicted it. Whether either counts as poor depends on the absolute measure, the relative one, and where somebody drew a line.

Five things to carry out of Part Two. Davis-Moore says unequal rewards fill demanding positions. The objections say reward tracks power rather than importance, that essential work is often the least rewarded, and that unequal starting points prevent the sorting the thesis assumes. The objection is aimed at the mechanism, not at the existence of different positions. The conflict account explains persistence by who controls the rules of transmission, and it needs nobody to intend anything. The interactionist account works in the room: an accent or a brand states a position before anyone states a number, and those markers are learned early and acquired late with difficulty. A national average is a mean, and a mean conceals distribution. A Gini coefficient supplies the spread in one figure — and one figure cannot say where in the distribution the inequality sits, so two societies can share a Gini and be nothing alike. Modernization theory reads the gap between nations as a difference in stage; dependency theory reads it as a relationship, with wealth in one place connected to extraction from another. World systems analysis builds a three-position framework from the second, and the middle tier is what keeps the whole thing stable. And the capstone's finding is the one to keep: two households on identical income can be entirely different households, because income is received and wealth is held. Six months of identical bad luck separates them permanently. Unit Seven turns to race, gender, and age as stratification systems in their own right.