Between-Country Inequality

The Great Divergence — and Partial Convergence

The gap between the world's richest and poorest countries is staggering. GDP per capita in the US is roughly $80,000; in Burundi, it is about $240. This 300-fold difference is a relatively recent phenomenon — in 1800, the gap between the richest and poorest countries was perhaps 5 to 1.

The 'Great Divergence' accelerated during the Industrial Revolution, as Western Europe and North America pulled ahead. Colonial exploitation, unfavorable trade terms, and institutional extraction further widened the gap. By the mid-20th century, a vast chasm separated the 'developed' and 'developing' worlds.

Since the 1990s, there has been partial convergence. China's extraordinary growth lifted its GDP per capita from $300 in 1990 to over $12,000 today. India, Vietnam, Bangladesh, and other Asian countries have also grown rapidly. However, much of Sub-Saharan Africa has stagnated, and the gap between the poorest countries and the rest has actually widened. The story of between-country inequality is one of selective convergence — some countries are catching up while others fall further behind.

Going Deeper

The concept covered in this lesson connects to broader analytical frameworks that students of politics, diplomacy, and global affairs encounter across many topics. Mastery requires moving beyond memorization to application — understanding not just what the concept means, but how it operates in real-world contexts.

Connecting Theory to Cases

The most effective way to deepen understanding is through case-based learning. For any analytical concept, identify three to five real-world cases that illustrate it:

• One canonical case: the most-cited example, often historical.
• One contemporary case: a current situation where the concept applies.
• One contrasting case: a situation that initially seems similar but where the concept does not apply, helping you understand the boundaries.
• One contested case: a situation where scholars disagree about whether the concept applies.

Working through cases this way builds the analytical flexibility that distinguishes strong policy and diplomatic thinkers from those who can only apply concepts mechanically.

Cross-Disciplinary Connections

Political concepts rarely operate in isolation. The most sophisticated analysis connects:

• Historical context: how did this concept develop, and why did it emerge when it did?
• Theoretical lineage: which scholars and traditions have shaped how the concept is understood?
• Empirical evidence: what does systematic research show about the concept's application?
• Policy implications: how do decision-makers actually use this concept in practice?
• Critiques: what are the strongest objections to the concept's usefulness?

The layered understanding that comes from working across these dimensions is what serious political and diplomatic research requires.

Building Your Analytical Vocabulary

For MUN delegates, debate competitors, IB and AP students, and political-research practitioners, building a substantial analytical vocabulary is one of the highest-leverage skills. Each concept you genuinely master is a tool you can apply across many different situations. Make a habit of working through Model Diplomat's broader glossary coverage of related concepts, building the connections that make your analytical work more sophisticated over time.