6.1 Systems of Stratification & Social Class

Introduction to Social Stratification

Social stratification is a foundational sociological concept that describes the structured ranking of entire groups of people that perpetuates unequal economic rewards and power in a society. Unlike individual inequality, stratification is systemic and passed down from generation to generation. Stratification is deeply embedded in the social structure and is supported by a society's cultural beliefs and ideologies, which justify the unequal distribution of resources.

Sociologists distinguish between different stratification systems based on the degree of social mobility they allow. These systems are generally categorized on a spectrum from closed systems to open systems.

Systems of Stratification

There are four primary historical and contemporary systems of stratification: slavery, caste, estate, and class.

1. Slavery Slavery is the most extreme form of legalized social inequality, where individuals are owned by others as property. Historically, slavery was often justified by beliefs about racial inferiority, religious differences, or the right of conquest. Slaves have no rights and are treated as commodities to be bought and sold. While formal chattel slavery has been legally abolished worldwide, modern forms of slavery, such as human trafficking and forced labor, continue to persist globally.

2. Caste Systems A caste system is a closed system of stratification in which social position is dictated entirely by heredity or birth (ascribed status). Individuals are born into a caste and remain in it for life, with little to no opportunity for social mobility. Caste systems strictly regulate marriage (promoting endogamy, or marriage within one's caste), occupation, and social interactions. The most famous example is the traditional caste system of India, which, although legally abolished, still influences social life. Another example is the apartheid system in South Africa, which legally separated people based on race.

3. Estate Systems Also known as feudalism, the estate system was prominent in Europe during the Middle Ages. It required peasants to work land leased to them by nobles in exchange for military protection and other services. The three main estates were the nobility (who owned the land), the clergy (the church), and the commoners (peasants, serfs, merchants, and artisans). While there was slightly more mobility than in a caste system, birth generally dictated one's estate.

4. Class Systems A class system is an open stratification system primarily based on economic position, achieved statuses, and individual effort. In a class system, there are no rigid legal or religious boundaries between strata, allowing for social mobility. However, birth still heavily influences a person's starting point and life chances. A person's class position is typically determined by their Socioeconomic Status (SES).

Socioeconomic Status (SES) and Its Dimensions

Sociologists use the concept of Socioeconomic Status (SES) to measure a person's or family's social class position. SES is a composite measure that takes into account several interconnected dimensions:

• Income: The flow of money received over a specific period, usually from wages, salaries, government aid, or investments.
• Wealth (Net Worth): The total value of all assets a person owns (real estate, stocks, bonds, savings) minus any debts. Wealth is more unevenly distributed than income and provides significant economic security and generational advantages.
• Occupational Prestige: The social respect, admiration, and recognition associated with a particular occupation. Generally, professions requiring more education and autonomy (e.g., physicians, professors, lawyers) hold higher prestige than manual labor.
• Educational Attainment: The highest level of education an individual has completed. Education is tightly linked to both occupational prestige and income potential.

Professions and Occupations

College Board lists professions and occupations as its own Social Stratification topic because work organizes status, authority, and life chances—not only as a stand-in for income. An occupation is a socially recognized category of paid work; a profession is an occupation that claims specialized expertise, formal credentials, a code of ethics, and substantial workplace autonomy (classic examples: medicine, law, and the clergy). Occupational prestige scales show Americans consistently rank physicians, professors, and scientists above retail or unskilled labor jobs, even when income gaps are held partly constant. Prestige also tracks authority (how many people one supervises), credential barriers (licenses and degrees that restrict entry), and debates about deskilling—whether bureaucracy and technology erode professional autonomy.

Conflict theorists treat professions as occupational monopolies: associations and licensing boards can limit supply, raise fees, and protect members' market position. Functionalists (including the Davis-Moore thesis) argue that higher rewards for high-skill occupations motivate people to invest years of training society needs. On CLEP items, expect scenarios that ask which Weberian dimension a job ranking illustrates—class (economic resources), status/prestige (honor), or party/power—and whether a role is framed as a profession versus ordinary paid labor.

The U.S. Social Class Hierarchy

While there is no official dividing line between classes, sociologists generally recognize a layered class structure in the United States, typically broken down into the following categories:

The Upper Class (Capitalist Class) Comprising roughly 1% to 2% of the population, the upper class controls a vast amount of the nation's wealth. They are divided into the "old money" (inherited wealth over generations, like the Rockefellers or Vanderbilts) and "new money" (wealth newly acquired through entrepreneurship or entertainment, such as tech billionaires). Members of the upper class have enormous influence on the economy, politics, and culture.

The Upper-Middle Class Making up about 15% of the population, this group includes highly educated professionals and managers (doctors, corporate executives, senior lawyers). They generally hold advanced degrees and earn high incomes, allowing them comfortable lifestyles and significant savings.

The Lower-Middle Class Approximately 30% of the population falls into this category, which includes lower-level managers, semi-professionals, craftspeople, and non-retail sales workers. They typically have at least a high school diploma and some college education. They lead modest but comfortable lives, though they may struggle to accumulate significant wealth.

The Working Class Comprising another 30% of the population, the working class generally includes clerical workers, retail workers, and blue-collar manual laborers. Their jobs often involve routine tasks with little autonomy. The working class is highly vulnerable to economic downturns and job outsourcing.

The Working Poor Making up about 15% of the population, the working poor are individuals who work full-time or part-time but whose incomes fall near or below the poverty line. They often lack benefits, face housing insecurity, and struggle to afford basic necessities. Their jobs are typically in service, seasonal, or minimum-wage sectors.

The Underclass The underclass (roughly 5% of the population) consists of individuals who are chronically unemployed or underemployed. They may rely heavily on public assistance and often reside in impoverished inner-city or rural areas. They face systemic barriers to entering the mainstream economy, including lack of education, poor health, and discrimination.

Income vs. Wealth Inequality

Inequality in the United States and globally is vast. It is crucial to distinguish between income inequality and wealth inequality.

Income Inequality refers to the unequal distribution of earnings. Over the past few decades, income inequality in the U.S. has risen significantly, with the top 1% seeing massive gains while the wages of the middle and lower classes have largely stagnated when adjusted for inflation.

Wealth Inequality is far more extreme than income inequality. A small percentage of the population controls the vast majority of the nation's assets. Because wealth can be inherited and invested to create more wealth, the wealth gap is deeply entrenched and persistent. For example, the racial wealth gap is profound, rooted in historical discrimination such as redlining and unequal access to housing and education.

Economists and sociologists often use the Gini coefficient (or Gini index) to measure inequality. A Gini coefficient of 0 represents perfect equality (everyone has the exact same income/wealth), while a coefficient of 1 represents perfect inequality (one person has all the income/wealth). The U.S. has one of the highest Gini coefficients among wealthy industrialized nations, reflecting its high levels of stratification.