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title: "Homo Deus: A Brief History of Tomorrow"
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# Homo Deus: A Brief History of Tomorrow

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Official U.S. edition with full color illustrations throughout. NEW YORK TIMES BESTSELLER Yuval Noah Harari, author of the critically-acclaimed New York Times bestseller and international phenomenon Sapiens , returns with an equally original, compelling, and provocative book, turning his focus toward the future of humanity, and our quest to upgrade humans into gods. Over the past century humankind has managed to do the impossible and rein in famine, plague, and war. This may seem hard to accept, but, as Harari explains in his trademark style—thorough, yet riveting—famine, plague and war have been transformed from incomprehensible and uncontrollable forces of nature into manageable challenges. For the first time ever, more people die from eating too much than from eating too little; more people die from old age than from infectious diseases; and more people commit suicide than are killed by soldiers, terrorists and criminals put together. The average American is a thousand times more likely to die from binging at McDonalds than from being blown up by Al Qaeda. What then will replace famine, plague, and war at the top of the human agenda? As the self-made gods of planet earth, what destinies will we set ourselves, and which quests will we undertake? Homo Deus explores the projects, dreams and nightmares that will shape the twenty-first century—from overcoming death to creating artificial life and artificial intelligence. It asks the fundamental questions: Where do we go from here? And how will we protect this fragile world from our own destructive powers? This provocative work of popular science is the next stage of evolution. This is Homo Deus . With the same insight and clarity that made Sapiens an international hit and a New York Times bestseller, Harari maps out our future. But as we stand on the verge of godhood, what new challenges will replace the old ones? The New Human Agenda: With famine, plague, and war no longer seen as uncontrollable forces of nature, Harari argues that humanity will aim for immortality, happiness, and divinity. What happens when we try to play God? Upgrading Humankind: Explore the profound implications of biotechnology and genetic engineering as Homo sapiens attempts to evolve into Homo deus . Is this the next stage of evolution, or the beginning of the end? The Rise of Dataism: Discover the emergence of a new religion where information is the ultimate value. What happens to human free will when external algorithms know us better than we know ourselves? The Future of Consciousness: This groundbreaking book examines the decoupling of intelligence from consciousness and asks the fundamental question: will a world dominated by super-intelligence and AI have any room left for the human spirit?

Review: Humans are toast; the data religion will rule - Most of this is not about “tomorrow” but about yesterday and today. Most of the material that pertains most directly to the future begins with Chapter 8 which is two-thirds of the way into the book. But no matter. This is another brilliant book by the very learned and articulate Professor Harari. It should be emphasized that Harari is by profession a historian. It is remarkable that he can also be not only a futurist but a pre-historian as well as evidenced by his previous book, “Sapiens.” This quote from page 15 may serve as a point of departure: “Previously the main sources of wealth were material assets such as gold mines, wheat fields and oil fields. Today the main source of wealth is knowledge.” (p. 15) In the latter part of the book Harari defines this knowledge more precisely as algorithms. We and all the plants in the ground and all fish in the sea are biological algorithms. There is no “self,” no free will, no individuals (he says we are “dividuals”) no God in the sky, and by the way, humans as presently constituted are toast. The interesting thing about all this from my point of view is that I agree almost completely. I came to pretty much the same conclusions in my book, “The World Is Not as We Think It Is” several years ago. What I want to do in this review is present a number of quotes from the book and make brief comments on them, or just let them speak for themselves. In this manner I think the reader can see how beautifully Harari writes and how deep and original a thinker he is. “Islamic fundamentalists could never have toppled Saddam Hussein by themselves. Instead they enraged the USA by the 9/11 attacks, and the USA destroyed the Middle Eastern china shop for them. Now they flourish in the wreckage.” (p. 19) Notice “fundamentalists” instead of “terrorists.” This is correct because ISIS, et al., have been financed by Muslim fundamentalists in places like Saudi Arabia. “You want to know how super-intelligent cyborgs might treat ordinary flesh-and-blood humans? Better start by investigating how humans treat their less intelligent animal cousins.” (p. 67) Harari speaks of a “web of meaning” and posits, “To study history means to watch the spinning and unravelling of these webs, and to realise that what seems to people in one age the most important thing in life becomes utterly meaningless to their descendants.” (p. 147) One of the themes begun in “Sapiens” and continued here is the idea that say 20,000 years ago humans were not only better off than they were in say 1850, but smarter than they are today. (See e.g., page 176 and also page 326 where Harari writes that it would be “immensely difficult to design a robotic hunter-gatherer” because of the great many skills that would have to be learned.) In “The World Is Not as We Think It Is” I express it like this: wild animals are smarter than domesticated animals; humans have domesticated themselves. For Harari Nazism, Communism, “liberalism” humanism, etc. are religions. I put “liberalism” in quotes because Harari uses the term in a historical sense not as the opposite of conservatism in the contemporary parlance. “For religions, spirituality is a dangerous threat.” (p. 186) I would add that religions are primarily social and political organizations. “If I invest $100 million searching for oil in Alaska and I find it, then I now have more oil, but my grandchildren will have less of it. In contrast, if I invest $100 million researching solar energy, and I find a new and more efficient way of harnessing it, then both I and my grandchildren will have more energy.” (p. 213) “The greatest scientific discovery was the discovery of ignorance.” (p. 213) On global warming: “Even if bad comes to worse and science cannot hold off the deluge, engineers could still build a hi-tech Noah’s Ark for the upper caste, while leaving billions of others to drown….” (p. 217) “More than a century after Nietzsche pronounced Him dead, God seems to be making a comeback. But this is a mirage. God is dead—it’s just taking a while to get rid of the body.” (p. 270) “…desires are nothing but a pattern of firing neurons.” (p. 289) Harari notes that a cyber-attack might shut down the US power grid, cause industrial accidents, etc., but also “wipe out financial records so that trillions of dollars simply vanish without a trace and nobody knows who owns what.” (p. 312) Now THAT ought to scare the bejesus out of certain members of the one percent! On the nature of unconscious cyber beings, Harari asserts that for armies and corporations “intelligence is mandatory but consciousness is optional.” (p. 314) This seems obvious but I would like to point out that what “consciousness” is is unclear and poorly defined. While acknowledging that we’re not there yet, Harari thinks it’s possible that future fMRI machines could function as “almost infallible truth machines.” Add this to all the knowledge that Facebook and Google have on each of us and you might get a brainstorm: totalitarianism for humans as presently constituted is inevitable. One of conundrums of the not too distance future is what are we going to do with all the people who do not have jobs, the unemployable, what Harari believes may be called the “useless class”? Answer found elsewhere: a guaranteed minimum income (GMI). Yes, with cheap robotic labor and AI, welfare is an important meme of the future. Harari speculates on pages 331 and 332 that artificial intelligence might “exterminate human kind.” Why? For fear humans will pull the plug. Harari mentions “the motivation of a system smarter than” humans. My problem with this is that machines, unless it is programmed in, have no motivations. However it could be argued that they must be programmed in such a way as to maintain themselves. In other words they do have a motivation. Recently I discussed this with a friend and we came to the conclusion that yes the machines will protect themselves and keep on keeping on, but they would not reproduce themselves because new machines would be taking resources from themselves. Harari believes that we have “narrating selves” that spew out stories about why we do what we do, narratives that direct our behavior. He believes that with the mighty algorithms to come—think Google, Microsoft and Facebook being a thousand times more invasive and controlling so that they know more about us than we know about ourselves. Understanding this we will have to realize that we are “integral parts of a huge global network” and not individuals. (See e.g., page 343) Harari even sees Google voting for us (since it will know our desires and needs better than we do). (p. 344) After the election of Trump in which some poor people voted to help billionaires get richer and themselves poorer, I think perhaps democracy as presently practiced may go the way of the dodo. An interesting idea taking this further is to imagine as Harari does that Google, Facebook, et al. in say the personification of Microsoft’s Cortana, become first oracles, then agents for us and finally sovereigns. God is dead. Long live God. Along the way we may find that the books you read “will read you while you reading them.” (p. 349) In other words what is coming are “techno-religions” which Harari sees as being of two types: “techno-humanism and data religion.” He writes that “the most interesting place in the world from a religious perspective is…Silicon Valley.” (p. 356) The last chapter in the book, Chapter 11 is entitled “The Data Religion” in which the Dataists create the “Internet-of-All-Things.” Harari concludes, “Once this mission is accomplished, Homo sapiens will vanish.” (p. 386) --Dennis Littrell, author of “Hard Science and the Unknowable”
Review: Intriguing and profound - Sapiens is among my favorite books, and its full of fascinating ideas. To my eyes, that book firmly established that its the Inter-subjective realm (our ability to create and share fictions) that gives humanity its power in nature, and essentially separates us from other animals. He makes an absolutely compelling and practical case for that. I managed to get through years of College philosophy without realizing anything even remotely similar to that. And how that has changed my worldview! Ever since I read that book I can understand better the madness of the modern world; our religions, nation-states, companies and media personalities. What was formerly incomprehensible; people glued to their cell phones and Facebook profiles, throngs chanting midevil rituals on Sunday, wild celebrity worship, bizarre legal and religious doctrines, bureaucracy and its true power, all these mysteries are suddenly clear and connected thanks to Sapiens. Homo Deus summarizes the fundamentals of Sapiens in the first half of the book. Then it goes to dramatic new places which are a projection and warning about modern technologies and trends. To me his writing is always carefully and reasonably articulated and he states plainly when and where he is speculating. Sure he draws many extrapolations forward but that's the point of this book! When he presupposes he admits it as such, exactly as he did in Sapiens. If the 20th Century was really was a war among Humanist sects (as he contends)...then the advances of 21st Century science and technology are beginning to chip away at what has been assumed to be our sacred and individual human essence. That's an idea with major implications. Do you agree that Humanism is the modern world's primary underlying religion and that it is now (possibly) in danger? After some consideration, I agree with the notion, and also that it seems to be at risk as new discoveries chip away at the sacred notion of self. Everything that underpins the modern world: consumerism (the customer is always right), our political system (democratic voting), and our psychology (do what feels right) are all based on the assumption that the 'self' is irreducible. But what if that 'self' isn't so clear or autonomous? It appears less so every day, as computer/person hybrid thinking becomes more common (think GPS navigation), and as new understandings emerge about what makes us, well...US. Meanwhile, computer AI advances accelerate at an insane pace, doing things declared previously impossible only months earlier. Medicine does the same. New cheaper DNA sequencing and practical DNA splicing/editing reveal mechanics that underlie our physiology and psychology. And hey, we're on the verge of 3d printing organs! Even without something like an AI consciousness emerging, the fact is that most of what we do really can be off-loaded to more efficient computer algorithms. When today the most powerful entities in the world are not people but rather inter-subjective entities like Google, will our children's world still be ruled by the 'sacred' self? Can that 'sacred' self be defined clearly, or rather manipulated, ostracized, dissected, distracted, drug-altered, or click-baited one way or another? Or is that not already a pretty darn good description of our modern world? You be the judge, but this book speculates reasonably about plenty of reasons to be nervous.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Best Sellers Rank | #20,775 in Kindle Store ( See Top 100 in Kindle Store ) #1 in Physics of Time (Kindle Store) #1 in History of Biology & Nature #3 in General Anthropology |

## Images

![Homo Deus: A Brief History of Tomorrow - Image 1](https://m.media-amazon.com/images/I/71hvR32htPL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Humans are toast; the data religion will rule
*by D***L on July 10, 2017*

Most of this is not about “tomorrow” but about yesterday and today. Most of the material that pertains most directly to the future begins with Chapter 8 which is two-thirds of the way into the book. But no matter. This is another brilliant book by the very learned and articulate Professor Harari. It should be emphasized that Harari is by profession a historian. It is remarkable that he can also be not only a futurist but a pre-historian as well as evidenced by his previous book, “Sapiens.” This quote from page 15 may serve as a point of departure: “Previously the main sources of wealth were material assets such as gold mines, wheat fields and oil fields. Today the main source of wealth is knowledge.” (p. 15) In the latter part of the book Harari defines this knowledge more precisely as algorithms. We and all the plants in the ground and all fish in the sea are biological algorithms. There is no “self,” no free will, no individuals (he says we are “dividuals”) no God in the sky, and by the way, humans as presently constituted are toast. The interesting thing about all this from my point of view is that I agree almost completely. I came to pretty much the same conclusions in my book, “The World Is Not as We Think It Is” several years ago. What I want to do in this review is present a number of quotes from the book and make brief comments on them, or just let them speak for themselves. In this manner I think the reader can see how beautifully Harari writes and how deep and original a thinker he is. “Islamic fundamentalists could never have toppled Saddam Hussein by themselves. Instead they enraged the USA by the 9/11 attacks, and the USA destroyed the Middle Eastern china shop for them. Now they flourish in the wreckage.” (p. 19) Notice “fundamentalists” instead of “terrorists.” This is correct because ISIS, et al., have been financed by Muslim fundamentalists in places like Saudi Arabia. “You want to know how super-intelligent cyborgs might treat ordinary flesh-and-blood humans? Better start by investigating how humans treat their less intelligent animal cousins.” (p. 67) Harari speaks of a “web of meaning” and posits, “To study history means to watch the spinning and unravelling of these webs, and to realise that what seems to people in one age the most important thing in life becomes utterly meaningless to their descendants.” (p. 147) One of the themes begun in “Sapiens” and continued here is the idea that say 20,000 years ago humans were not only better off than they were in say 1850, but smarter than they are today. (See e.g., page 176 and also page 326 where Harari writes that it would be “immensely difficult to design a robotic hunter-gatherer” because of the great many skills that would have to be learned.) In “The World Is Not as We Think It Is” I express it like this: wild animals are smarter than domesticated animals; humans have domesticated themselves. For Harari Nazism, Communism, “liberalism” humanism, etc. are religions. I put “liberalism” in quotes because Harari uses the term in a historical sense not as the opposite of conservatism in the contemporary parlance. “For religions, spirituality is a dangerous threat.” (p. 186) I would add that religions are primarily social and political organizations. “If I invest $100 million searching for oil in Alaska and I find it, then I now have more oil, but my grandchildren will have less of it. In contrast, if I invest $100 million researching solar energy, and I find a new and more efficient way of harnessing it, then both I and my grandchildren will have more energy.” (p. 213) “The greatest scientific discovery was the discovery of ignorance.” (p. 213) On global warming: “Even if bad comes to worse and science cannot hold off the deluge, engineers could still build a hi-tech Noah’s Ark for the upper caste, while leaving billions of others to drown….” (p. 217) “More than a century after Nietzsche pronounced Him dead, God seems to be making a comeback. But this is a mirage. God is dead—it’s just taking a while to get rid of the body.” (p. 270) “…desires are nothing but a pattern of firing neurons.” (p. 289) Harari notes that a cyber-attack might shut down the US power grid, cause industrial accidents, etc., but also “wipe out financial records so that trillions of dollars simply vanish without a trace and nobody knows who owns what.” (p. 312) Now THAT ought to scare the bejesus out of certain members of the one percent! On the nature of unconscious cyber beings, Harari asserts that for armies and corporations “intelligence is mandatory but consciousness is optional.” (p. 314) This seems obvious but I would like to point out that what “consciousness” is is unclear and poorly defined. While acknowledging that we’re not there yet, Harari thinks it’s possible that future fMRI machines could function as “almost infallible truth machines.” Add this to all the knowledge that Facebook and Google have on each of us and you might get a brainstorm: totalitarianism for humans as presently constituted is inevitable. One of conundrums of the not too distance future is what are we going to do with all the people who do not have jobs, the unemployable, what Harari believes may be called the “useless class”? Answer found elsewhere: a guaranteed minimum income (GMI). Yes, with cheap robotic labor and AI, welfare is an important meme of the future. Harari speculates on pages 331 and 332 that artificial intelligence might “exterminate human kind.” Why? For fear humans will pull the plug. Harari mentions “the motivation of a system smarter than” humans. My problem with this is that machines, unless it is programmed in, have no motivations. However it could be argued that they must be programmed in such a way as to maintain themselves. In other words they do have a motivation. Recently I discussed this with a friend and we came to the conclusion that yes the machines will protect themselves and keep on keeping on, but they would not reproduce themselves because new machines would be taking resources from themselves. Harari believes that we have “narrating selves” that spew out stories about why we do what we do, narratives that direct our behavior. He believes that with the mighty algorithms to come—think Google, Microsoft and Facebook being a thousand times more invasive and controlling so that they know more about us than we know about ourselves. Understanding this we will have to realize that we are “integral parts of a huge global network” and not individuals. (See e.g., page 343) Harari even sees Google voting for us (since it will know our desires and needs better than we do). (p. 344) After the election of Trump in which some poor people voted to help billionaires get richer and themselves poorer, I think perhaps democracy as presently practiced may go the way of the dodo. An interesting idea taking this further is to imagine as Harari does that Google, Facebook, et al. in say the personification of Microsoft’s Cortana, become first oracles, then agents for us and finally sovereigns. God is dead. Long live God. Along the way we may find that the books you read “will read you while you reading them.” (p. 349) In other words what is coming are “techno-religions” which Harari sees as being of two types: “techno-humanism and data religion.” He writes that “the most interesting place in the world from a religious perspective is…Silicon Valley.” (p. 356) The last chapter in the book, Chapter 11 is entitled “The Data Religion” in which the Dataists create the “Internet-of-All-Things.” Harari concludes, “Once this mission is accomplished, Homo sapiens will vanish.” (p. 386) --Dennis Littrell, author of “Hard Science and the Unknowable”

### ⭐⭐⭐⭐⭐ Intriguing and profound
*by P***R on March 31, 2017*

Sapiens is among my favorite books, and its full of fascinating ideas. To my eyes, that book firmly established that its the Inter-subjective realm (our ability to create and share fictions) that gives humanity its power in nature, and essentially separates us from other animals. He makes an absolutely compelling and practical case for that. I managed to get through years of College philosophy without realizing anything even remotely similar to that. And how that has changed my worldview! Ever since I read that book I can understand better the madness of the modern world; our religions, nation-states, companies and media personalities. What was formerly incomprehensible; people glued to their cell phones and Facebook profiles, throngs chanting midevil rituals on Sunday, wild celebrity worship, bizarre legal and religious doctrines, bureaucracy and its true power, all these mysteries are suddenly clear and connected thanks to Sapiens. Homo Deus summarizes the fundamentals of Sapiens in the first half of the book. Then it goes to dramatic new places which are a projection and warning about modern technologies and trends. To me his writing is always carefully and reasonably articulated and he states plainly when and where he is speculating. Sure he draws many extrapolations forward but that's the point of this book! When he presupposes he admits it as such, exactly as he did in Sapiens. If the 20th Century was really was a war among Humanist sects (as he contends)...then the advances of 21st Century science and technology are beginning to chip away at what has been assumed to be our sacred and individual human essence. That's an idea with major implications. Do you agree that Humanism is the modern world's primary underlying religion and that it is now (possibly) in danger? After some consideration, I agree with the notion, and also that it seems to be at risk as new discoveries chip away at the sacred notion of self. Everything that underpins the modern world: consumerism (the customer is always right), our political system (democratic voting), and our psychology (do what feels right) are all based on the assumption that the 'self' is irreducible. But what if that 'self' isn't so clear or autonomous? It appears less so every day, as computer/person hybrid thinking becomes more common (think GPS navigation), and as new understandings emerge about what makes us, well...US. Meanwhile, computer AI advances accelerate at an insane pace, doing things declared previously impossible only months earlier. Medicine does the same. New cheaper DNA sequencing and practical DNA splicing/editing reveal mechanics that underlie our physiology and psychology. And hey, we're on the verge of 3d printing organs! Even without something like an AI consciousness emerging, the fact is that most of what we do really can be off-loaded to more efficient computer algorithms. When today the most powerful entities in the world are not people but rather inter-subjective entities like Google, will our children's world still be ruled by the 'sacred' self? Can that 'sacred' self be defined clearly, or rather manipulated, ostracized, dissected, distracted, drug-altered, or click-baited one way or another? Or is that not already a pretty darn good description of our modern world? You be the judge, but this book speculates reasonably about plenty of reasons to be nervous.

### ⭐⭐⭐⭐ Entertaining if presumptuous take on the future of mankind
*by M***T on December 6, 2022*

God-Man is what this title means, but the content isn’t quite so literal. There are no themes in this book that haven’t been dealt with by numerous science fiction novels. But this isn’t supposed to be fiction, instead a sober look at where the history of humans, coupled with the technology of the twenty-first century, is taking us. So where is that? The author cites three overall goals motivating humanity since its inception, and, according to Harari, now nascent and imbedded in modern technology. They are: (1) to be ageless, literally to live forever (beginning with living much longer than we do now) provided that we are not killed in accidents or murdered, (2) to be happy always, and (3) to acquire god-like (small ‘g’) powers of mind and body through mechanics, genetics, and cybernetics, All of these are, he thinks, possible in the next 50 or so years despite the first’s violating the second law of thermodynamics, the second being a mental state that appears to demand an occasional (at least) lapse into something else to reset itself, leaving the third as the only one understood well enough to be achievable in some measure. Interestingly, achieving the third goal would have the most predictable negative impact on our present value systems and ways of life–illustrated to chilling effect in his last chapter. Putting it bluntly, post-sapiens humans take over the world, enslaving (or just eliminating, there being no further need for human labor) the rest of us. In a further twist, cybernetic intelligence eventually eliminates even those quasi-sapiens for its own sake, there being no further need for humans of any sort. Concerning these specific prognostications, Harari gives himself an out. This is only speculation. The future is open, and there are many ways our technology might develop, and not everything we want may be possible. He also understands that perhaps time is not on our side. Some near future events (global nuclear war or civilizational collapse due to climate or ecological disaster) might derail our progress. Concerning the foundational assumptions of his projections, what makes them reasonable (and possible), he leaves himself no wiggle room. Three things he assures us must be true: (1) the universe is entirely physical (no God, no extra-physical mind). As a consequence (2), free will is an illusion, and (3) so is the self. This leads him down a path of epistemic nihilism. Our brains react to every sensory input and make every decision some seconds (or fractions of seconds) before we are even aware of them. Our experiential arena is subjectively real (how this is given there is no subject) but has no impact whatsoever on what we think, feel, or do–there being no individual “us” anyway. The absurd consequences of these assumptions (he is not alone in believing these and cites long-challenged experiments purporting to prove them), for example, that there is no “he,” no Yuval Harari to whom we might give credit for this book, escape him. Homo Deus is rich with philosophical implications, but the author is writing from a historical perspective and a forecast of “future history.” He is not trying to do philosophy, so I leave explorations of these implications for a blog essay. The book is well-written and entertaining. His take on human history from the paleolithic to the Enlightenment, the book’s part one, is novel. He credits literal religion (among other things) with pushing mankind forward until our own discoveries dethroned it, installing a new [metaphorical] religion, Humanism, the book’s part two, which brought us to the edge of the present age. Humanism is to be dethroned now, part three, and yet another [metaphorical] religion Harari calls Dataism is emerging. This overall thesis is coherent given his assumptions and gracefully presented with considerable humor, so four stars, even if it is more than a bit presumptuous!

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