Overview and Core Argument
“Unstoppable Us, Volume 2: Why the World Isn’t Fair” is Yuval Noah Harari’s second installment in his children’s history series, published in 2024. Following the first volume’s exploration of how Homo sapiens came to dominate the planet, this second book tackles one of humanity’s most persistent and troubling questions: why human societies developed such profound inequalities, and why the world we live in today is characterized by vast disparities in wealth, power, and opportunity.
The book continues Harari’s project of making his grand historical narratives accessible to younger readers, typically aged 10 and up, while maintaining the intellectual rigor and provocative questioning that characterizes his adult works. Where Volume 1 focused on humanity’s biological and cognitive evolution—our development of language, imagination, and cooperation—Volume 2 shifts to examine what happened after humans settled down, developed agriculture, and built civilizations. The central thesis is that the Agricultural Revolution, rather than being an unambiguous step forward for humanity, created the conditions for systematic inequality that persist to this day.
Harari argues that fairness is not a natural state of human societies. The hunter-gatherer bands that characterized most of human history were relatively egalitarian, not because early humans were morally superior, but because their way of life made it difficult for anyone to accumulate significant power or resources. The transition to agriculture and settled life fundamentally changed this dynamic, creating surpluses that could be controlled, hierarchies that could be enforced, and imagined orders that could justify inequality as natural, divinely ordained, or necessary for social order.
The Agricultural Revolution and the Birth of Inequality
The book begins by revisiting the Agricultural Revolution, which Harari has famously called “history’s biggest fraud” in his adult work. For young readers, he explains how this transformation—which occurred independently in several parts of the world beginning around 10,000 years ago—seemed like progress but came with hidden costs. Humans domesticated plants and animals, which allowed them to produce more food and support larger populations. But this abundance came at a price.
Harari explains that individual farmers actually worked harder and had less varied diets than hunter-gatherers. They were more vulnerable to famine when crops failed, more susceptible to diseases that spread in dense settlements, and more likely to suffer from malnutrition when they depended on a narrow range of crops. The real “winners” of the Agricultural Revolution were not individual humans but the collective—humanity as a species grew in numbers, even as individual quality of life often declined.
More importantly for this volume’s argument, agriculture created the possibility of ownership and accumulation in ways that had been impossible before. Hunter-gatherers owned little because they had to carry everything they possessed. Farmers, by contrast, invested labor in land, built permanent structures, and stored surplus grain. This surplus became the foundation of inequality. Those who controlled the surplus—whether through force, cunning, or inherited position—gained power over those who did not.
The book explores how this dynamic played out in early agricultural societies. Some people became rulers, priests, or warriors, while others remained farmers or became slaves. The surplus food produced by many fed the few who did not work in the fields but instead specialized in governance, religion, warfare, or craft production. Harari emphasizes that this was not inevitable—it was one possible outcome of agricultural life—but once it began, it became self-reinforcing.
Imagined Orders and the Justification of Hierarchy
A central concept in the book is the idea of “imagined orders”—shared beliefs and stories that exist only in human minds but have real power to organize society. This concept, which appears throughout Harari’s work, is particularly important for explaining how inequality became entrenched and accepted.
Harari explains to young readers that humans are unique in our ability to believe in things that exist only in our collective imagination: nations, money, laws, gods, human rights. These imagined orders are not lies exactly—they are shared fictions that allow large numbers of strangers to cooperate. But they can also be used to justify and maintain inequality.
The book examines various imagined orders that have supported hierarchical societies throughout history. Ancient civilizations developed elaborate mythologies explaining why kings ruled by divine right, why certain families were noble while others were common, why some people were born to command and others to obey. The Code of Hammurabi in ancient Babylon, for instance, explicitly prescribed different punishments for the same crime depending on whether the victim was a noble, a commoner, or a slave—enshrining inequality in law and claiming divine sanction for it.
Harari discusses the caste system in India as another example of an imagined order that created and maintained rigid social hierarchies. People were born into castes that determined their occupation, social status, and even whom they could marry. The system was justified through religious beliefs about karma and reincarnation—the idea that one’s caste reflected the moral quality of one’s actions in past lives. This made the hierarchy seem not just inevitable but morally justified, even to those at the bottom.
The book also explores how gender hierarchies emerged and were justified through imagined orders. Harari notes that most agricultural societies became patriarchal, with men holding most positions of power and authority. Various explanations were offered—that men were naturally stronger, that women’s role in childbearing made them unsuitable for public life, that gods or nature had ordained male dominance. But Harari encourages young readers to question these justifications, noting that the actual reasons for patriarchy’s emergence remain debated by historians, and that the specific forms it took varied greatly across cultures.
The Role of Writing and Bureaucracy
Harari dedicates significant attention to how writing and bureaucracy enabled and reinforced inequality. The invention of writing, which occurred in several ancient civilizations, was not initially used for poetry or philosophy but for accounting—keeping track of who owned what, who owed what to whom, and who had paid their taxes.
Writing allowed rulers to administer larger territories and more complex hierarchies. Scribes could record laws, track tribute payments, and maintain lists of subjects. This created a new class of literate elites who controlled access to written knowledge. In many societies, literacy was restricted to a small minority—priests, officials, and aristocrats—which gave them power over the illiterate majority.
The book explains how bureaucracies developed to manage agricultural surpluses and organize large-scale projects. Governments collected taxes, conscripted labor for public works, and maintained armies. These bureaucracies were hierarchical by nature, with clear chains of command and unequal distributions of power. They also required people to be categorized and counted—as taxpayers, soldiers, or subjects—which reinforced the idea that people’s identities and roles were fixed and knowable.
Harari uses examples from ancient Egypt, Mesopotamia, and China to illustrate how writing and bureaucracy worked in practice. He describes how Egyptian scribes recorded grain harvests and tax payments, how Mesopotamian tablets tracked debts and property ownership, and how Chinese officials administered vast territories through written edicts and reports. These systems made large-scale inequality possible and sustainable.
Empire, Conquest, and the Spread of Inequality
The book examines how empires spread and standardized forms of inequality across vast regions. As some societies grew more powerful through agricultural surplus, organized armies, and effective administration, they conquered their neighbors. Empires imposed their languages, laws, and social hierarchies on conquered peoples.
Harari explains that empires were often brutal and exploitative, extracting wealth from subject populations to enrich the imperial center. But they also created larger zones of shared culture and trade. The book discusses several major empires—the Roman Empire, the Persian Empire, the Chinese Empire—and how they organized diverse populations under single systems of rule.
Importantly, Harari notes that empires often claimed to bring civilization, order, and even justice to the peoples they conquered. Imperial ideologies presented conquest as beneficial, a way of spreading superior culture and governance to backward peoples. These justifications were imagined orders that made imperial rule seem legitimate and even benevolent, despite the violence and exploitation it involved.
The book also explores how empires created new forms of identity and hierarchy. People became Roman citizens or barbarians, civilized Chinese or uncivilized nomads, believers or infidels. These categories determined one’s rights, opportunities, and place in the social order. Harari emphasizes that these identities were not natural or inevitable but were created and maintained through law, custom, and shared belief.
Religion and Social Order
Religion receives substantial attention as both a source of meaning and a tool for maintaining social hierarchies. Harari explains how religions provided answers to fundamental questions about existence, suffering, and morality, but also how they were used to justify inequality.
The book discusses polytheistic religions of the ancient world, which often had gods associated with different social functions—gods of war, agriculture, kingship. These religions generally accepted social hierarchy as part of the natural order. Monotheistic religions like Judaism, Christianity, and Islam introduced the idea that all humans were equal before God, which was potentially revolutionary. But in practice, these religions also developed hierarchies—between clergy and laity, between believers and non-believers, between men and women.
Harari explores how religious authorities often allied with political rulers to maintain social order. Kings claimed to rule by divine right, priests blessed royal authority, and religious law reinforced social hierarchies. At the same time, religious ideas about justice, compassion, and human dignity sometimes inspired challenges to inequality and movements for social reform.
The book discusses Buddhism as an example of a religion that questioned social hierarchies, particularly the caste system in India. The Buddha taught that enlightenment was available to anyone regardless of birth, which challenged Brahmanical authority. But Harari notes that Buddhism, like other religions, developed its own hierarchies and institutions over time.
Money, Trade, and Economic Inequality
Harari devotes considerable attention to the invention of money and its role in creating and maintaining economic inequality. Money, he explains, is another imagined order—pieces of metal, paper, or digital records that have value only because we collectively believe they do. But this shared fiction is incredibly powerful.
Money made trade easier and more efficient than barter, allowing people to exchange goods and services across great distances and time. But it also created new forms of inequality. Those who accumulated money gained power over those who did not. Wealth could be stored, inherited, and used to generate more wealth. The gap between rich and poor, which had begun with agricultural surpluses, widened with the development of money and markets.
The book explains how money changed social relationships. In hunter-gatherer bands and early agricultural villages, people knew each other personally and relationships were based on kinship, reciprocity, and reputation. Money allowed strangers to cooperate through impersonal exchange, which enabled larger and more complex societies. But it also meant that relationships became more transactional and less personal.
Harari discusses how debt became a form of power and control. Those who lent money gained leverage over borrowers. In many societies, people who could not repay debts became slaves or indentured servants. Debt bondage was a major source of unfreedom throughout history.
The book also explores how trade networks connected distant regions and created interdependence. Merchants became wealthy and influential, sometimes rivaling traditional aristocracies. But trade also created winners and losers—those who controlled trade routes and markets prospered, while others were exploited or displaced.
Slavery and Forced Labor
One of the book’s most important sections deals directly with slavery and other forms of forced labor. Harari does not shy away from this difficult topic, explaining to young readers how millions of people throughout history were treated as property, denied freedom, and forced to work for others’ benefit.
The book explains that slavery existed in many ancient civilizations and took various forms. Some slaves were prisoners of war, others were born into slavery, and still others were enslaved through debt or kidnapping. Slavery was justified through imagined orders that claimed certain people were naturally inferior or that slavery was a legitimate punishment for defeat in war or failure to repay debts.
Harari discusses the Atlantic slave trade as a particularly brutal example of slavery on a massive scale. Millions of Africans were forcibly transported to the Americas to work on plantations producing sugar, cotton, and other crops. This system enriched European and American slave owners and traders while causing immense suffering. It was justified through racist ideologies that claimed Africans were inferior and suited for enslavement—imagined orders that had no basis in biological reality but were widely believed and used to maintain the system.
The book also discusses other forms of forced labor, including serfdom in medieval Europe and Russia, where peasants were bound to the land and owed labor to lords. These systems, while different from chattel slavery, also involved severe restrictions on freedom and created rigid hierarchies.
Harari emphasizes that slavery and forced labor were not inevitable features of human society but choices made by those with power. He also notes that enslaved people resisted in various ways—through rebellion, escape, and the preservation of their cultures and dignity despite oppression.
Challenges to Inequality: Reform and Revolution
While much of the book focuses on how inequality emerged and was maintained, Harari also discusses how people have challenged and sometimes reduced inequality throughout history. This section is important for showing young readers that the current state of affairs is not fixed and that human choices can create change.
The book discusses various reform movements and revolutions that challenged existing hierarchies. It explores how enslaved people fought for freedom, how peasants rebelled against oppressive lords, and how workers organized for better conditions. Some of these challenges succeeded in reducing inequality, at least temporarily or partially, while others were crushed.
Harari discusses the development of ideas about human rights and equality, particularly in the Enlightenment and the age of democratic revolutions. The American and French Revolutions proclaimed that all people were created equal and had natural rights—ideas that challenged traditional hierarchies based on birth and divine right. But the book also notes the limitations and contradictions of these movements. The American founders proclaimed equality while maintaining slavery. The French Revolution’s ideals of liberty, equality, and fraternity were followed by the Terror and then by Napoleon’s empire.
The book explores the abolition of slavery as a major achievement in reducing inequality, noting the roles of enslaved people’s resistance, moral arguments by abolitionists, and changing economic conditions. It also discusses the women’s suffrage movement, labor movements, and civil rights movements as examples of successful challenges to inequality.
Harari emphasizes that progress has been uneven and incomplete. While legal slavery has been abolished in most of the world, other forms of exploitation and inequality persist. The book encourages young readers to think critically about contemporary inequalities and to recognize that they, like people in the past, have choices about what kind of world they want to create.
Contemporary Inequality and Future Possibilities
The final sections of the book bring the discussion to the present day, examining how inequality manifests in the contemporary world and what might be done about it. Harari explains that while we no longer have legal slavery or feudalism in most places, vast inequalities remain.
The book discusses economic inequality, noting that a small percentage of the world’s population controls most of its wealth while billions live in poverty. It explores how this inequality is maintained through systems of property ownership, inheritance, and economic structures that concentrate wealth and power. Harari explains concepts like capitalism and how markets, while creating prosperity for some, also generate inequality.
The book also discusses inequality between countries, explaining how historical factors like colonialism and contemporary factors like trade relationships and debt create disparities between wealthy and poor nations. It explores how people in wealthy countries often enjoy opportunities and living standards that are unavailable to those in poor countries, not because of individual merit but because of where they were born.
Harari discusses various forms of discrimination that create inequality—racism, sexism, discrimination based on religion, ethnicity, or sexual orientation. He explains how these are imagined orders, categories that humans created and that have no basis in biology, but that have real effects on people’s lives.
The book considers possible futures, both optimistic and pessimistic. It discusses how technology might reduce or increase inequality. Automation and artificial intelligence could create abundance that benefits everyone, or they could concentrate wealth and power even further in the hands of those who control these technologies. Harari encourages young readers to think about what kind of future they want and how they might work toward it.
The Author and His Project
Yuval Noah Harari is an Israeli historian who gained international fame with his 2011 book “Sapiens: A Brief History of Humankind,” which became a global bestseller. That book, along with its sequels “Homo Deus” and “21 Lessons for the 21st Century,” established Harari as one of the most prominent public intellectuals of the early 21st century, known for his sweeping narratives about human history and his provocative questions about humanity’s future.
The “Unstoppable Us” series represents Harari’s effort to bring his big-picture historical thinking to younger audiences. Volume 1, published in 2022, covered human evolution and the cognitive revolution—how Homo sapiens developed language and imagination and came to dominate the planet. Volume 2 continues this project by tackling the question of inequality, one of the most important and contentious issues in contemporary society.
Harari’s approach is characterized by several distinctive features. He emphasizes the role of imagination and shared fictions in human history, arguing that our ability to believe in things that exist only in our collective minds—nations, money, gods, corporations, human rights—is what allows large-scale human cooperation. He questions narratives of inevitable progress, suggesting that many developments we consider advances came with significant costs. And he encourages readers to recognize that much of what we take for granted as natural or inevitable is actually contingent and changeable.
In writing for children, Harari maintains his characteristic clarity and accessibility while simplifying complex arguments and avoiding some of the more controversial or speculative elements of his adult work. The book is illustrated and uses engaging examples and stories to maintain young readers’ interest. It asks questions rather than simply providing answers, encouraging readers to think critically about the world around them.
Reception and Significance
The “Unstoppable Us” series has been generally well-received as an ambitious attempt to introduce young readers to big questions about human history and society. Educators and parents have praised Harari’s ability to make complex ideas accessible without talking down to children. The books have been seen as valuable tools for encouraging critical thinking about history, society, and contemporary issues.
Volume 2’s focus on inequality is particularly timely given contemporary debates about wealth gaps, social justice, and systemic discrimination. By showing how inequality emerged historically and how it has been justified through imagined orders, the book provides young readers with conceptual tools for understanding and questioning contemporary inequalities.
Some critics have noted that Harari’s grand narratives necessarily simplify complex historical processes and that his emphasis on shared fictions and imagined orders, while illuminating, can sometimes underplay material factors and power relations. Others have questioned whether some of his arguments are too sophisticated or potentially disturbing for young readers. However, most reviewers have concluded that the book succeeds in its primary goal of making young people think seriously about why the world is the way it is and whether it could be different.
The book fits into a broader trend of children’s literature that tackles serious social and political issues rather than shielding young readers from difficult realities. It reflects a belief that children are capable of understanding and thinking critically about complex problems and that engaging them in these discussions is important for developing informed, thoughtful citizens.
“Unstoppable Us, Volume 2” ultimately argues that inequality is not natural or inevitable but is created and maintained through human choices, institutions, and beliefs. By understanding how inequality emerged and how it has been justified throughout history, young readers are better equipped to question contemporary inequalities and to imagine and work toward a fairer world. This message—that the world isn’t fair but that humans have the power to make it fairer—is the book’s central and most important contribution.
