21 Lessons for the 21st Century
Quotes from the Book
You could never convince a monkey to give you a banana by promising him limitless bananas after death in monkey heaven.
How do you cause people to believe in an imagined order such as Christianity, democracy or capitalism? First, you never admit that the order is imagined.
Consistency is the playground of dull minds.
Culture tends to argue that it forbids only that which is unnatural. But from a biological perspective, nothing is unnatural. Whatever is possible is by definition also natural. A truly unnatural behaviour, one that goes against the laws of nature, simply cannot exist, so it would need no prohibition.
How many young college graduates have taken demanding jobs in high-powered firms, vowing that they will work hard to earn money that will enable them to retire and pursue their real interests when they are thirty-five? But by the time they reach that age, they have large mortgages, children to school, houses in the suburbs that necessitate at least two cars per family, and a sense that life is not worth living without really good wine and expensive holidays abroad. What are they supposed to do, go back to digging up roots? No, they double their efforts and keep slaving away.
One of history’s few iron laws is that luxuries tend to become necessities and to spawn new obligations.
The romantic contrast between modern industry that “destroys nature” and our ancestors who “lived in harmony with nature” is groundless. Long before the Industrial Revolution, Homo sapiens held the record among all organisms for driving the most plant and animal species to their extinctions. We have the dubious distinction of being the deadliest species in the annals of life.
History is something that very few people have been doing while everyone else was ploughing fields and carrying water buckets.
According to Buddhism, the root of suffering is neither the feeling of pain nor of sadness nor even of meaninglessness. Rather, the real root of suffering is this never-ending and pointless pursuit of ephemeral feelings, which causes us to be in a constant state of tension, restlessness and dissatisfaction. Due to this pursuit, the mind is never satisfied. Even when experiencing pleasure, it is not content, because it fears this feeling might soon disappear, and craves that this feeling should stay and intensify. People are liberated from suffering not when they experience this or that fleeting pleasure, but rather when they understand the impermanent nature of all their feelings, and stop craving them. This is the aim of Buddhist meditation practices. In meditation, you are supposed to closely observe your mind and body, witness the ceaseless arising and passing of all your feelings, and realise how pointless it is to pursue them. When the pursuit stops, the mind becomes very relaxed, clear and satisfied. All kinds of feelings go on arising and passing – joy, anger, boredom, lust – but once you stop craving particular feelings, you can just accept them for what they are. You live in the present moment instead of fantasising about what might have been. The resulting serenity is so profound that those who spend their lives in the frenzied pursuit of pleasant feelings can hardly imagine it. It is like a man standing for decades on the seashore, embracing certain ‘good’ waves and trying to prevent them from disintegrating, while simultaneously pushing back ‘bad’ waves to prevent them from getting near him. Day in, day out, the man stands on the beach, driving himself crazy with this fruitless exercise. Eventually, he sits down on the sand and just allows the waves to come and go as they please. How peaceful!
This is the essence of the Agricultural Revolution: the ability to keep more people alive under worse conditions.
Ever since the Cognitive Revolution, Sapiens have thus been living in a dual reality. On the one hand, the objective reality of rivers, trees and lions; and on the other hand, the imagined reality of gods, nations and corporations. As time went by, the imagined reality became ever more powerful, so that today the very survival of rivers, trees and lions depends on the grace of imagined entities such as the United States and Google.
We did not domesticate wheat. It domesticated us.
So, monotheism explains order, but is mystified by evil. Dualism explains evil, but is puzzled by order. There is one logical way of solving the riddle: to argue that there is a single omnipotent God who created the entire universe – and He’s evil. But nobody in history has had the stomach for such a belief.
money is the most universal and most efficient system of mutual trust ever devised.
happiness does not really depend on objective conditions of either wealth, health or even community. Rather, it depends on the correlation between objective conditions and subjective expectations.
Voltaire said about God that ‘there is no God, but don’t tell that to my servant, lest he murder me at night’. Hammurabi would have said the same about his principle of hierarchy, and Thomas Jefferson about human rights. Homo sapiens has no natural rights, just as spiders, hyenas and chimpanzees have no natural rights. But don’t tell that to our servants, lest they murder us at night.
Each year the US population spends more money on diets than the amount needed to feed all the hungry people in the rest of the world.
Evolution has made Homo sapiens, like other social mammals, a xenophobic creature. Sapiens instinctively divide humanity into two parts, ‘we’ and ‘they’.
As far as we can tell from a purely scientific viewpoint, human life has absolutely no meaning. Humans are the outcome of blind evolutionary processes that operate without goal or purpose. Our actions are not part of some divine cosmic plan, and if planet earth were to blow up tomorrow morning, the universe would probably keep going about its business as usual. As far as we can tell at this point, human subjectivity would not be missed. Hence any meaning that people inscribe to their lives is just a delusion.
Is there anything more dangerous than dissatisfied and irresponsible gods who don’t know what they want?
We study history not to know the future but to widen our horizons, to understand that our present situation is neither natural nor inevitable, and that we consequently have many more possibilities before us than we imagine.
Nothing captures the biological argument better than the famous New Age slogan: ‘Happiness begins within.’ Money, social status, plastic surgery, beautiful houses, powerful positions – none of these will bring you happiness. Lasting happiness comes only from serotonin, dopamine and oxytocin.
in order to change an existing imagined order, we must first believe in an alternative imagined order.
How can we distinguish what is biologically determined from what people merely try to justify through biological myths? A good rule of thumb is ‘Biology enables, Culture forbids.’ Biology is willing to tolerate a very wide spectrum of possibilities. It’s culture that obliges people to realize some possibilities while forbidding others. Biology enables women to have children – some cultures oblige women to realize this possibility. Biology enables men to enjoy sex with one another – some cultures forbid them to realize this possibility. Culture tends to argue that it forbids only that which is unnatural. But from a biological perspective, nothing is unnatural. Whatever is possible is by definition also natural. A truly unnatural behavior, one that goes against the laws of nature, simply cannot exist.
Domesticated chickens and cattle may well be an evolutionary success story, but they are also among the most miserable creatures that ever lived. The domestication of animals was founded on a series of brutal practices that only became crueller with the passing of the centuries.
Large numbers of strangers can cooperate successfully by believing in common myths. Any large-scale human cooperation – whether a modern state, a medieval church, an ancient city or an archaic tribe – is rooted in common myths that exist only in people’s collective imagination.
Hierarchies serve an important function. They enable complete strangers to know how to treat one another without wasting the time and energy needed to become personally acquainted.
Did you know?
- The book grew out of a series of lectures Harari gave at the Hebrew University of Jerusalem.
- It was first published in Hebrew in 2011 and in English in 2014.
- Harari frames human history around four revolutions: Cognitive, Agricultural, Unification, and Scientific.
- The book spent well over a hundred weeks on the New York Times bestseller list and has been translated into more than 60 languages.
- It has been publicly praised by Bill Gates and Mark Zuckerberg.
- A graphic-novel adaptation was co-created with David Vandermeulen beginning in 2020.
About Yuval Noah Harari
More by Yuval Noah Harari
21 Lessons for the 21st Century
Homo Deus: A History of Tomorrow
About the book
Sapiens: A Brief History of Humankind is a sweeping work of popular history by the Israeli historian Yuval Noah Harari, first published in Hebrew in 2011 and in English in 2014. Grown out of a lecture course Harari taught at the Hebrew University of Jerusalem, the book traces the story of our species from the emergence of archaic humans in the Stone Age through to the present day, blending the natural and social sciences to ask how one animal among many came to dominate the planet.
Harari organizes the human past around four great turning points: the Cognitive Revolution of roughly 70,000 years ago, the Agricultural Revolution of about 10,000 years ago, the gradual Unification of Humankind, and the Scientific Revolution beginning around 1543. His central argument is that Homo sapiens rose to dominance because it is uniquely able to cooperate flexibly in large numbers, a capacity rooted in the ability to believe in shared fictions that exist only in the imagination, such as gods, nations, money, and human rights.
From this premise the book develops a series of provocative claims: that the Agricultural Revolution boosted populations while often making individual lives harder, and that material and technological progress has not clearly made people happier. Sapiens became a global bestseller, endorsed by figures such as Bill Gates and Mark Zuckerberg and translated into dozens of languages, even as some anthropologists and scientists criticized its sweeping generalizations and factual simplifications.
Book details
- First published
- 2011
- Length
- 443 pages
- Reading time
- 9 hours
- Author
- Yuval Noah Harari
- Genre
- History
- Goodreads rating
- 4.33 (1.3M ratings) →
Movie & TV adaptations
- IMDb
If you liked this, read…
- 1Guns, Germs, and SteelJared Diamond's grand narrative of why human societies developed so differently.
- 2Homo Deus: A Brief History of TomorrowHarari's own follow-up, turning from humanity's past to its possible future.
- 3A Short History of Nearly EverythingBill Bryson's accessible big-picture tour of science and human knowledge.
Keep reading
Homo Deus: A History of Tomorrow
The Social Conquest of Earth
Straw Dogs: Thoughts on Humans and Other Animals
A Short History of Progress
Civilized to Death: What Was Lost on the Way to Modernity
Enlightenment Now: The Case for Reason, Science, Humanism, and Progress
The Blank Slate: The Modern Denial of Human Nature
Humankind: A Hopeful History
Dragons of Eden: Speculations on the Evolution of Human Intelligence
Endgame, Vol. 1: The Problem of Civilization
21 Lessons for the 21st Century
The Lost World
A Hunter-Gatherer's Guide to the 21st Century: Evolution and the Challenges of Modern Life
The Rational Optimist: How Prosperity Evolves
A Language Older Than Words
Ishmael: An Adventure of the Mind and Spirit
On Human Nature
The Story of B: An Adventure of the Mind and Spirit
Small Is Beautiful: Economics as if People Mattered
The Wizard and the Prophet: Two Remarkable Scientists and Their Dueling Visions to Shape Tomorrow's World
The One-Straw Revolution
The Dawn of Everything: A New History of Humanity
Walden Two
The Culture of Make Believe
Shadows of Forgotten Ancestors
Human Action: A Treatise on Economics
The Red Queen: Sex and the Evolution of Human Nature
The Ministry for the Future
Beyond Civilization: Humanity's Next Great Adventure
Religion Explained: The Evolutionary Origins of Religious Thought
The Fifth Science
Billions & Billions: Thoughts on Life and Death at the Brink of the Millennium
The Evolution of Everything: How New Ideas Emerge
The World-Ending Fire: The Essential Wendell Berry
What's Wrong with the World
2312
Revolution
The Midwich Cuckoos
A History of the World in 100 Objects
The Moral Landscape: How Science Can Determine Human Values
The Big Picture: On the Origins of Life, Meaning, and the Universe Itself
Genesis
12 Rules for Life: An Antidote to Chaos
Undeniable: Evolution and the Science of Creation
The Social Animal: The Hidden Sources of Love, Character, and Achievement
Genome
The Sane Society
Collapse: How Societies Choose to Fail or Succeed
In Praise of Idleness and Other Essays
The Fatal Conceit: The Errors of Socialism
Heretics
The Soul of Man Under Socialism
Guns, Germs, and Steel: The Fates of Human Societies
The Third Chimpanzee: The Evolution and Future of the Human Animal
The Human Condition
The Lessons of History
Civilization: The West and the Rest
Jurassic Park
House Corrino
From Dawn to Decadence: 500 Years of Western Cultural Life, 1500 to the Present

