Johan Norberg's *Peak Human*: Seven Golden Ages to Understand Our Own

Johan Norberg is a Swedish liberal and a researcher at the Cato Institute in Washington. He published Progress in 2016, Open in 2020, and The Capitalist Manifesto in 2023. Each book defends the same central thesis: open societies that welcome foreign ideas, trade, and intellectual freedom prosper. Closed societies that turn inward decline.

Peak Human, published in May 2025, is his most ambitious book. It does not defend an economic or political thesis. It tells seven stories: seven moments in human history when a society reached an unprecedented level of creativity, prosperity, and innovation. And it asks a question: what made these golden ages possible? And what destroyed them?

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The Structure of the Book: Seven Golden Ages

Norberg chooses seven periods and places: Athens in the 5th century BCE, the Roman Republic in the 2nd and 1st centuries BCE, the Abbasid Caliphate of Baghdad in the 8th and 9th centuries, Song China in the 10th and 11th centuries, Renaissance Florence in the 15th and 16th centuries, the Dutch Republic in the 17th century, and finally the Anglosphere of the last two centuries.

This choice is deliberately non-Western in its first half. Norberg devotes entire chapters to Baghdad under the Abbasids, which was then the largest and most learned city in the world, and to Song China, which had invented printing, gunpowder, and the compass several centuries before Europe. This choice allows him to avoid the trap of a Eurocentric narrative: progress is not a Western invention, but a universal human capacity that expresses itself when the conditions are right.

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What Makes a Golden Age: Norberg's Thesis

The book's central thesis is simple to state, but difficult to prove. According to Norberg, all golden ages share four characteristics: openness to foreigners and ideas from elsewhere, intellectual freedom and relative tolerance for dissent, an economic system that allows for exchange and the accumulation of wealth, and a culture that values curiosity and experimentation.

Athens welcomed philosophers, merchants, and artists from all over the Mediterranean world. Baghdad under the Abbasids systematically translated Greek, Persian, Indian, and Syriac texts. Medici Florence attracted artists and scholars from all over Italy and Europe. The Dutch Republic was a refuge for French Protestants, Sephardic Jews from Spain, and free thinkers from all over Europe.

In each case, openness precedes prosperity. It is not because a society is rich that it opens up; it is because it opens up that it becomes rich, intellectually and materially.

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What Destroys Golden Ages

The second part of the thesis is darker. Every golden age comes to an end. And in each case, the end follows the same pattern: a rise in nationalism, a retreat into identity politics, and intolerance, often accompanied by a concentration of power that stifles intellectual freedom.

Athens condemns Socrates to death. Baghdad closes itself to foreign translations under the influence of conservative theologians. Medici Florence is swept away by Savonarola and his bonfires of the vanities. The Dutch Republic succumbs to the pressure of protectionist guilds and religious wars.

The mechanism is always the same: an open society creates wealth and power, which attracts actors who want to protect their acquired position against external competition. These actors use nationalism, religion, or ideology to justify closure. Closure reduces creativity and innovation. Decline follows.

Norberg does not say that this mechanism is inevitable. He says that it is recurrent, and that we must recognize it to counter it.

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The Anglosphere: The Longest Golden Age

The longest chapter in the book is devoted to the Anglosphere, which Norberg defines as the group of English-speaking societies (United Kingdom, United States, Canada, Australia, New Zealand) and their global influence since the industrial revolution.

Norberg argues that the Anglosphere has created the longest and most transformative golden age in human history. In two centuries, global life expectancy has doubled. Extreme poverty has fallen from 90% to less than 10% of the world's population. Literacy has risen from 15% to 85% of the adult population. These transformations would not have been possible without the institutions, technologies, and ideas developed in the English-speaking world.

But Norberg also devotes a third of this chapter to the threats to this golden age. He identifies three major worrying trends: trade protectionism (illustrated by the tariff policies of the Trump administration), nationalist retreat (Brexit, the rise of populist parties), and the erosion of intellectual freedom (cancel culture, polarization of public debate).

These trends are not new. They resemble the dynamics that ended previous golden ages. Norberg does not predict the end of the Anglosphere's golden age. He says that the warning signs are there, and that they must be taken seriously.

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Critical Reception

Peak Human was well received by English-speaking critics. The Economist ranked it among its best books of 2025, with the comment: "Could a history book be more timely?" The Financial Times praised its "fresh details and provocative arguments." The Times of London called it "brilliant and necessary."

The reception was more mixed in academic circles. Some historians criticized Norberg for selecting his examples to confirm his thesis, while ignoring counter-examples (relatively open societies that declined for other reasons, relatively closed societies that prospered for a time). Contemporary China, for example, has experienced spectacular economic growth under an authoritarian regime, which complicates the simple thesis that "openness = prosperity."

Norberg addresses this objection in the book. He distinguishes between short-term economic growth, which can occur in authoritarian regimes through the mobilization of underutilized resources, and long-term creativity and innovation, which require intellectual freedom. Song China was more open than the Ming China that succeeded it, and it was under the Song that the great Chinese inventions were made.

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What the Book Says to a French Reader in 2026

Peak Human is a book that speaks directly to the European situation in 2026. Europe is facing protectionist pressures (trade war with the United States, the temptation of "Buy European"), nationalist movements that question the free movement of people and ideas, and a polarization of public debate that makes rational discussion difficult.

Norberg does not say that Europe will decline. He says that societies that have chosen openness have prospered, and those that have chosen closure have declined. This is not a law of nature, but a historical regularity. And historical regularities can be contradicted by conscious political choices.

For readers of the "Journal d'un Progressiste," Peak Human offers a historical framework for understanding why lucid optimism is an intellectually defensible position. Golden ages exist. They are fragile. They can be preserved if we understand what makes them possible.

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What the Book Doesn't Say

Peak Human has blind spots. Norberg is little interested in the living conditions of the populations that did not belong to the creative elites of the golden ages. Athens was a democracy for free men, not for slaves or women. The prosperity of the Dutch Republic was based in part on the colonial trade and the slave trade.

These omissions do not disqualify the central thesis, but they do qualify it. Openness and intellectual freedom have often coexisted with deep inequalities and massive exclusions. The question of how to make golden ages more inclusive is a question that Norberg raises little.

Perhaps that is the next book.

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In Summary

Peak Human is a history book that reads like a political essay. It is well-documented, well-written, and defends a clear thesis with serious arguments. It is not free from confirmation bias, but it offers a useful reading framework for understanding why some societies create conditions favorable to human progress and others do not.

For a reader seeking to understand why "wanting to be 20 today" is a defensible position, it is a recommended reading.

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Bibliographical Note

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The Counter-arguments: What Norberg Doesn't Always Convince

Norberg's thesis has serious opponents. The first counter-argument is the selection of examples. Norberg chooses seven societies that fit his thesis. But history is full of relatively open societies that have declined for external reasons (invasions, natural disasters, epidemics) and relatively closed societies that have prospered for prolonged periods.

The second counter-argument is that of causality. Norberg claims that openness causes prosperity. But it is possible that the relationship is the other way around: societies that prosper have the means to open up, while societies in difficulty turn inward. Distinguishing cause from effect is difficult in complex social systems.

The third counter-argument is that of exclusion. As mentioned above, Norberg's golden ages were often golden ages for an elite, not for the entire population. The question of how to make progress more inclusive is a question that Norberg touches on but does not systematically address.

These objections do not destroy Norberg's thesis. They force it to be read with a critical mind. Which is precisely what the JdP seeks to encourage.

Why Read Norberg in 2026

Johan Norberg is one of the few intellectuals who defends an optimistic position on human progress with solid empirical arguments. In an intellectual landscape dominated by declinism and catastrophic narratives, his books offer a necessary counterweight.

His first major book, Progress (2016), documented in ten chapters the reduction of poverty, hunger, infant mortality, illiteracy, and wars in the world over the past two centuries. It was published at a time when Brexit and the election of Trump seemed to announce a reversal of the trend. Open (2020) defended the free movement of people, ideas, and goods as a condition for progress. The Capitalist Manifesto (2023) responded to criticisms of capitalism from both the left and the right.

Peak Human is the synthesis of these works. By anchoring his thesis in the long history, Norberg gives it a depth that his previous books did not have. The question is no longer just "is the world getting better?", but "why do some societies create the conditions for progress and others do not?". This is a more fundamental question, and Norberg's answer, even if it is debatable, is intellectually stimulating.

For French readers, the difficulty is that Peak Human has not yet been translated into French. Norberg's previous books have been translated with a delay of two to three years. A French translation of Peak Human is likely by 2027. In the meantime, the English version is accessible and reads smoothly, without technical jargon.

Sources and Further Reading

1. Johan Norberg, Peak Human, Atlantic Books, May 2025

2. The Economist, "How golden ages really start and end", May 2025, economist.com

3. Financial Times, review of Peak Human, May 2025

4. Advisor Perspectives, "Johan Norberg's History of the World's 7 Golden Ages", November 2025, advisorperspectives.com

5. Johan Norberg, Progress: Ten Reasons to Look Forward to the Future, Oneworld Publications, 2016

6. Johan Norberg, Open: The Story of Human Progress, Atlantic Books, 2020

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