Why Do Successful Civilizations Decline?

One question, four different theories.

History was never my favourite subject when I was younger. A while ago, I accepted the challenge of teaching it as the fourth subject at our school. I said yes mainly because I wanted another pair of glasses through which I could observe the world.

Why do societies and civilizations decline?

One question stayed with me for a long time: why do successful societies, states, and civilizations eventually begin to decline?

I’m certainly not the first person to ask this. Historians, economists, anthropologists, political scientists, and philosophers have been thinking about the rise and fall of civilizations for centuries. While exploring this topic, I came across four theories that really spoke to me. Although they are different, I felt they fit together surprisingly well.

Four Different Ways to Explain Why Civilizations Decline 

There is no single explanation for why civilizations decline. Some theories focus on wealth inequality, others on competition among elites, political institutions, or long-term cultural change. This article explores four influential perspectives. 

These theories differ in many ways and were never meant to form one shared model. Still, I noticed connections between them. Together, they tell one possible story of how a society can slowly begin to lose its stability.

Thomas Piketty: Wealth Concentration and Growing Inequality

Imagine a society where the economy is growing, but most people hardly feel that growth in their daily lives. Wages increase slowly, while housing prices and assets rise so quickly that those who already own wealth become richer and richer, while everyone else struggles to keep up.

Economist Thomas Piketty (1971–) argues that one of the greatest threats to society appears when wealth accumulates in the hands of a small group of people faster than the country’s economy grows. As a result, the gap between rich and poor becomes wider. Without appropriate policies, such as tax reforms, wealth continues to concentrate and grow in the hands of a very small number of people, while everyone else no longer sees the same rewards for their work.

How Wealth Concentration Can Destabilize Society

After a few decades, the consequences become visible: increasing inequality, fewer opportunities for the middle class to move forward, a growing sense of unfairness, stronger political polarization, and a less stable democracy. According to Piketty, these are long-term processes that can slowly undermine the stability of society.

But inequality alone does not explain why a society becomes unstable. So what happens next?

Peter Turchin: Too Many Elites, Too Few Positions of Power

This is where historian and evolutionary anthropologist Peter Turchin (1957–) enters the story. He argues that societies become unstable when they produce too many people with wealth, education, connections, or status who all compete for positions of power that are limited in number.

Think about two moments in history.

During the late Roman Republic, more and more aristocrats wanted positions of power, but the number of seats in the Senate, military commands, and consulships remained very limited.

Or take the French Revolution. It might never have succeeded if part of the educated and influential elite had not joined the hungry peasants and urban workers and helped organize them politically.

Competition Among Elites 

Competition among elites can also take the form of fighting for political offices, judicial appointments, leadership positions in government, or prestigious academic and media roles. Once the number of people seeking influence becomes larger than the number of available positions, political instability can begin to grow.

Still, competition among elites alone does not necessarily lead to collapse.

Acemoglu and Robinson: Why Institutions Matter 

But what if the elites begin changing the rules of the game?

Imagine two cities that are actually part of the same urban area. They share the same climate, history, and culture. The only thing separating them is a national border. Why do people on one side enjoy a much higher standard of living than those on the other?

Economists Daron Acemoglu (1967–) and James Robinson (1960–), in their book Why Nations Fail, describe the two cities of Nogales—one in Arizona, USA, and the other in Sonora, Mexico. Although they belong to the same urban area, living conditions on the American side are significantly better.

Using many historical examples, they argue that the future of nations and civilizations is largely shaped by the rules and institutions under which society operates.

Inclusive vs. Extractive Institutions 

They divide institutions into two broad groups.

Inclusive institutions limit political power, make education accessible, and uphold the rule of law. They encourage entrepreneurship and innovation, creating long-term economic growth.

Extractive institutions, on the other hand, are designed by elites to serve mainly their own interests. They are often marked by corruption, political monopolies, and weak courts. People lose the motivation to invest or create because those in power can easily take away the rewards of their work.

According to the authors, societies begin to decline when elites focus on protecting their own privileges. To achieve this, they gradually reshape the rules in their own favour. As this happens, the foundations of democracy and inclusive institutions begin to weaken.

And what if this continues for a long time?

Oswald Spengler: The Life Cycle of Civilizations

The Civilizational Life Cycle 

There is another way to look at the decline of societies—not as the result of specific economic or political processes, but as part of their natural life cycle.

Philosopher Oswald Spengler (1880–1936) tried to answer one of history’s oldest questions: why do great civilizations and empires disappear? His central idea was that civilizations are not eternal. Every society passes through a life cycle that can be divided into five stages:

• Birth, when new ideas, beliefs, and art emerge.
• Youth, a period of creativity, exploration, and great achievements.
• Maturity, when society becomes wealthy, stable, and technologically advanced.
• Old Age, when creativity fades and bureaucracy and materialism begin to dominate.
• Decline, when society loses its inner drive and eventually falls apart.

From Culture to Civilization 

Spengler distinguished between culture and civilization. Culture is creative, spiritual, and full of new ideas. Civilization, in contrast, is highly developed technologically, wealthy, filled with large cities, and increasingly focused on comfort, power, and money rather than creativity. For him, civilization was not the highest achievement of culture, but its final stage before decline.

Even after the First World War, Spengler argued that the West already showed signs of decay. Politics was becoming more about the struggle for power than about ideals. Money was beginning to dominate culture. Large cities continued to grow, people became increasingly disconnected from one another, shared values and religious belief weakened, and materialism became more widespread.

Do These Four Theories Tell the Same Story?

As I reflected on these theories, I realised that they complement one another surprisingly well.

Piketty describes a society where wealth becomes concentrated in the hands of fewer and fewer people. Turchin shows how this can increase competition within the elite. Acemoglu and Robinson explain what happens when part of that elite begins changing the rules and institutions for its own benefit. Spengler, meanwhile, might see all of these developments as signs that a society has lost its creative energy and entered the later stage of its life cycle.

It is important to remember that these theories do not form one reliable model for predicting the collapse of societies or civilizations. Instead, they offer four different pairs of glasses through which we can observe similar patterns.

How do these four theories sound to you? And where do you think our own society stands today?

What Can History Teach Us About the Future? 

The more I study history, the less I see it as a collection of dates and events, and the more I see it as a collection of patterns.

Ancient Rome is not fascinating only because of what happened two thousand years ago. It is fascinating because it allows us to observe processes that are much harder to recognise in the present. Perhaps that is history’s greatest value. It does not give us a crystal ball to predict the future. Instead, it gives us another pair of glasses that helps us notice patterns forming right in front of us.

History does not tell us what will happen.

But it does teach us which patterns are worth watching.

Perhaps that is why I keep returning to this question. Not because history tells us what will happen, but because it teaches us what is worth paying attention to today. 

Authorship and use of AI
This article is based on my own research, thinking, and editorial work. I used artificial intelligence as a support tool during the writing process, mainly for structuring the text, improving clarity, and, where relevant, translating it into English. All key decisions, interpretations, and the final version of the text are my own.

Further Reading:
– Thomas Piketty, Capital in the Twenty-First Century (2013)
– Peter Turchin, Ages of Discord (2016)
– Daron Acemoglu & James A. Robinson, Why Nations Fail: The Origins of Power, Prosperity, and Poverty (2012)
– Oswald Spengler, The Decline of the West (1918/1922)
– Peter Turchin (2010). Political instability may be a contributor in the coming decade. Nature.