# Lecture 10: Global Stratification and Inequality
## Introductory Sociology
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## Learning Objectives
By the end of this lecture, students will be able to:
1. Define global stratification and describe the classification of nations
2. Explain the extent and dimensions of global inequality
3. Compare theoretical explanations for global stratification
4. Discuss the consequences of global inequality for health and well-being
5. Evaluate strategies for reducing global poverty
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## Lecture Content
### I. Understanding Global Stratification
**Global stratification** is the unequal distribution of wealth, power, and prestige across nations. Nations are commonly classified into three tiers. **High-income countries** are highly industrialized with a high standard of living, including nations such as the United States, Canada, Japan, Western European countries, and Australia. They number approximately 65 nations and account for about 20% of the world's population while controlling most of global wealth. **Middle-income countries** have moderate levels of industrialization and standard of living, including nations such as Mexico, Brazil, China, India, and Thailand. They number approximately 75 nations and account for about 65% of the world's population, often featuring significant internal inequality and, in some cases, rapidly growing economies. **Low-income countries** have limited industrialization and widespread poverty, including many nations in sub-Saharan Africa and parts of South Asia. They number approximately 50 nations with about 15% of the world's population, where the majority of people work in agriculture with limited infrastructure.
Various terminologies have been used to classify nations. The First World, Second World, and Third World framework emerged during the Cold War era but is now outdated. The terms "developed," "developing," and "underdeveloped" have been criticized as Eurocentric. The Global North and Global South framework provides a geographic and economic distinction that is more widely used today.
### II. The Extent of Global Inequality
Income and wealth disparities across the globe are staggering. The richest 1% of the world owns more than the bottom 50% combined, and the average income in high-income countries is 50 to 75 times that of low-income countries. The **Human Development Index (HDI)**, a composite measure that includes life expectancy, education, and per capita income, reveals that nations such as Norway and Switzerland consistently rank highest, while low-income nations in sub-Saharan Africa and South Asia rank lowest.
The dimensions of global poverty are severe. Approximately 700 million people live in extreme poverty on less than $2.15 per day. About 735 million people are chronically undernourished. Billions lack access to clean water and sanitation. Millions of children are not in school, especially girls. Millions die annually from diseases that are treatable in wealthy nations, and inadequate shelter and housing affect hundreds of millions more. Global inequality also exists within nations -- even wealthy countries have significant poverty, and many middle-income countries such as South Africa and Brazil have extreme internal inequality.
A world map using color gradation to represent GDP per capita. High-income countries (North America, Western Europe, Japan, Australia) are shaded in dark green. Middle-income countries (parts of South America, Eastern Europe, China, Southeast Asia) are shaded in yellow-green. Low-income countries (much of sub-Saharan Africa, parts of South Asia) are shaded in red-orange. A legend indicates the color scale from highest to lowest GDP per capita. Inset bar graphs show: life expectancy (high-income: ~80 years, low-income: ~60 years), adult literacy rates, and infant mortality rates for each category. A caption reads: "Global stratification: wealth, health, and education vary dramatically across nations."
### III. Theoretical Explanations for Global Stratification
**Modernization theory**, rooted in structural functionalism, holds that global inequality reflects different stages of economic development. Walt Rostow identified five stages of economic growth: traditional society (subsistence agriculture, limited technology), preconditions for takeoff (investment in infrastructure, cultural shift toward progress), takeoff (rapid industrialization, economic growth), drive to maturity (diversified economy, technological sophistication), and high mass consumption (affluent consumer society). The solution proposed by modernization theory is for developing nations to adopt Western values, technology, and institutions. Critics charge that this perspective is ethnocentric, ignores the role of colonialism and exploitation, and assumes a single path to development.
**Dependency theory**, rooted in conflict theory, argues that global inequality results from the exploitation of poor nations by wealthy nations, with historical roots in colonialism and imperialism. Andre Gunder Frank argued that development and underdevelopment are two sides of the same coin: wealthy "core" nations extract resources and cheap labor from poor "peripheral" nations, keeping them in a state of dependency. Neocolonialism continues this pattern through multinational corporations, trade agreements, and debt, even without formal political control. Critics note that dependency theory may overemphasize external factors and underestimate internal factors, and that some formerly poor nations have achieved significant growth.
**World-systems theory**, developed by Immanuel Wallerstein, views the global economy as a single capitalist system with three tiers. **Core nations** are dominant, wealthy, and industrialized, exploiting the periphery. **Semi-peripheral nations** occupy an intermediate position, both exploiting and being exploited. **Peripheral nations** are economically dependent, providing raw materials and cheap labor. The position of nations can change over time, as demonstrated by China's movement from periphery toward core status. World-systems theory combines elements of both modernization and dependency theories.
### IV. Consequences of Global Inequality
The consequences of global inequality are profound across multiple domains. In **health**, the life expectancy gap between the highest- and lowest-income nations can exceed 20 years. Infant mortality is dramatically higher in low-income nations. HIV/AIDS, malaria, and tuberculosis disproportionately affect poor nations, and maternal mortality is vastly higher in low-income countries due to lack of healthcare access. Brain drain compounds the problem as trained healthcare workers emigrate from poor nations to wealthy ones.
In **education**, illiteracy rates are highest in low-income nations, and a gender gap in education disproportionately excludes girls in many regions. Limited education perpetuates the cycle of poverty. In terms of **human rights**, poverty is associated with political instability, authoritarianism, and human rights violations, including child labor, human trafficking, and forced migration. Environmental degradation disproportionately affects the global poor.
### V. Responses to Global Inequality
Several strategies have been employed to address global inequality. **Foreign aid** provides financial and technical assistance from wealthy nations and international organizations, though debate continues about whether aid genuinely helps or creates dependency. **International organizations** such as the World Bank, the International Monetary Fund (IMF), and the United Nations have implemented structural adjustment programs -- loans conditioned on free-market reforms -- which have been criticized for imposing neoliberal policies that may deepen inequality. **Fair trade** aims to ensure that producers in developing countries receive fair prices for their goods. **Microfinance**, pioneered by Muhammad Yunus and the Grameen Bank, provides small loans to entrepreneurs in developing nations. **Debt relief** involves canceling or reducing debts owed by the poorest nations.
**Sustainable development** seeks to meet present needs without compromising future generations' ability to meet their own. The United Nations Sustainable Development Goals (SDGs) outline 17 goals addressing poverty, health, education, equality, and environmental sustainability.
A three-tier concentric circle diagram illustrating Wallerstein's World-Systems Theory. The innermost circle is labeled "Core Nations" with examples (U.S., Germany, Japan) and characteristics: high-tech production, capital-intensive, high wages, dominant in global economy. The middle ring is labeled "Semi-Peripheral Nations" with examples (Brazil, China, India) and characteristics: mix of industrial and raw material production, moderate wages, both exploit and are exploited. The outermost ring is labeled "Peripheral Nations" with examples (many sub-Saharan African nations, Bangladesh, Haiti) and characteristics: raw material extraction, cheap labor, dependent on core. Arrows flow from periphery to core labeled "Resources, cheap labor, raw materials" and from core to periphery labeled "Manufactured goods, capital, debt." A caption reads: "Wallerstein's model shows how the global economy creates and maintains inequality through structural relationships between nations."
### VI. Globalization and Inequality: Current Trends
Global extreme poverty has declined significantly over the past 30 years, but progress has been uneven and fragile, with the COVID-19 pandemic reversing some gains. Income inequality between nations has slightly decreased, primarily due to growth in China and India, but income inequality within many nations has increased. Climate change threatens to deepen global inequality, as low-income nations are most vulnerable yet least responsible for emissions, leading to climate migration and resource conflicts. The digital divide -- unequal access to technology -- reinforces global stratification and threatens to create new forms of inequality.
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