第1章
When Humans Are Too Smart for Their Own Good
Friedrich Nietzsche had a complex relationship with animals-both pitying them for their mindless existence and envying their freedom from existential angst. His philosophical brilliance came at a terrible personal cost. Plagued by debilitating headaches since childhood, he spiraled into depression, hallucinations, and erratic behavior during his most productive years. In 1889, after embracing a beaten horse in Turin, he suffered a complete mental breakdown from which he never recovered, dying in a state of dementia.
This raises a provocative question: Was Nietzsche's genius ultimately his undoing? From an evolutionary perspective, complex thought might often be a liability rather than an advantage. The contrast between human suffering through self-awareness and the simpler existence of animals like narwhals reveals something profound about the costs of human intelligence.
Justin Gregg's work has become a surprising bestseller, resonating with readers tired of human exceptionalism narratives. The book has been translated into 17 languages and was named one of The Times' Books of the Year. Celebrities from Stephen Fry to Jane Goodall have praised its counterintuitive thesis. At a time when humanity faces self-created existential threats like climate change, Gregg's exploration of whether intelligence is truly adaptive feels especially relevant.
第2章
The Elusive Nature of Intelligence
Despite our confidence in human intellectual superiority, we can't actually define what intelligence is. When 567 AI experts were surveyed about the definition of intelligence, only 58.6% agreed with Pei Wang's definition of "adapting to the environment while working with insufficient knowledge and resources." The concept remains frustratingly elusive-SETI researchers don't even bother defining intelligence, implicitly suggesting it's whatever produces radio signals. As Philip Morrison noted, "it wasn't the intelligence we could detect; it was the communications."
We all approach intelligence with an "I know it when I see it" mentality, similar to how Supreme Court Justice Potter Stewart identified pornography. Whether it's alien radio waves, crows using tools, or fictional androids writing poetry, we recognize intelligence without being able to define it.
And despite our certainty that intelligence is beneficial, we should question this assumption. Had Nietzsche's mind been more narwhal-like, his madness might have been less severe-better for him and potentially the world. After his breakdown, Nietzsche was cared for by his sister Elisabeth, a far-right German nationalist and anti-Semite. When Nietzsche died in 1900, Elisabeth took control of his writings, manipulating them to support fascist ideologies despite his documented opposition to anti-Semitism. She published the posthumous "The Will to Power," portraying her brother as the intellectual forefather of National Socialism, even though Nietzsche would have despised Nazis.
This highlights the grand drawback of human intelligence: we can use our intellect to understand the universe's secrets, but also harness that knowledge for destruction. Humans can rationalize genocide and develop technology to execute it-narwhals don't build gas chambers.
Intelligence isn't a biological fact but a concept we've invented that distracts us from natural reality. Natural selection has never acted on a singular trait we could call "intelligence." Our technological achievements, born from cognitive traits shared with many species, aren't as exceptional as we believe. The Earth teems with animals that have found superior solutions for living well.
第3章
Why We Can't Stop Asking Why
Mike McCaskill spent twenty years trying to beat the stock market, finally striking gold with GameStop. Despite his success, he admits it was "a hundred percent all luck." Similarly, in 2012, a house cat named Orlando outperformed professional investment managers by randomly selecting stocks with a toy mouse. As economist Burton Malkiel noted, "Human nature likes order. People find it hard to accept the notion of randomness." Yet stock movements are essentially random, with consistent success coming not from picking individual stocks but from diversified investments over time.
This compulsion to understand "why" distinguishes humans from other animals. From childhood, we constantly ask causal questions about everything from talking cats to stock market movements. While this trait has obvious benefits, it's worth questioning whether asking "why" truly gives us a biological advantage, especially considering that for the first 250,000 years of human existence, we barely used this ability.
Looking back 240,000 years to Kenya's Lake Baringo region, early modern humans lived alongside chimpanzees in similar lifestyles. Though physically similar to us with larger brains than chimps, these humans still lived much like their ancestors. They had developed some cognitive advantages-using stone tools, controlling fire, and communicating through language-yet their lifestyle remained largely unchanged for 200,000 years.
Only about 44,000 years ago did evidence emerge of humans asking deeper "why" questions, manifested in Indonesian cave paintings depicting therianthropes (half-human, half-animal figures). These supernatural beings suggest our ancestors were grappling with existential questions about life's purpose and death. Shortly after, technological innovations accelerated-from hats to agriculture to aqueducts-all stemming from our understanding of cause and effect.
Yet despite these achievements, we must question why it took 200,000 years to begin this intellectual journey. The answer is simple: being a "why specialist" isn't as evolutionarily crucial as we might think. All animals, including early humans, thrived without asking why.
While walking in autumn woods with my friend Andrea and her dog Lucy, we were startled by a deep thumping sound and rustling leaves from an alder bush. Initially fearing a bear, investigation revealed only a fallen branch. Animals interpret such sudden noises through either learned associations or causal inference-the fundamental difference between animal thinking and why specialists like humans. Unlike bettongs, which must learn through direct experience that cats pose threats, humans possess imagination and causal understanding that allow us to cycle through infinite possibilities without firsthand experience.
The rooster-butt treatment for snakebites was an accepted medical practice throughout medieval Europe, appearing in 14th century Welsh medical texts alongside other remedies like curing deafness with ram urine and eel bile. These treatments emerged from humorism-a medical paradigm that dominated Western medicine for nearly 2,000 years. Though occasionally effective through luck, this system was eventually replaced by modern medicine using clinical trials to distinguish correlation from causation.
Despite our "why specialist" capabilities dating back to our species' origins, they didn't provide immediate evolutionary advantage. For 100,000 years, humans maintained population numbers similar to chimpanzees until advances like farming allowed us to settle and expand. This raises questions about whether our causal reasoning truly represents evolutionary superiority. Non-human animals succeed perfectly well through associative learning-chimpanzees self-medicate with bitter leaf plants without understanding why they work, and pigeons trained through classical conditioning can identify cancerous breast tissue with 99% accuracy when working as a group, outperforming human radiologists.
第4章
The Masters of Deception
Russell Oakes, a fraudulent veterinarian, had lied so convincingly about his credentials that he fooled not just his clients but perhaps even himself. This capacity for deception is a uniquely human trait that has shaped our success but may also lead to our downfall. Unlike animal communication, which typically transmits accurate information, humans have developed sophisticated abilities to intentionally deceive others.
Communication in the animal kingdom typically involves transmitting true information to alter another creature's behavior. The yellow petals of a dandelion signal nectar to insects, while the strawberry poison frog's bright red color warns predators of its toxicity. However, deception also exists in nature through mimicry-like stick bugs resembling twigs or harmless drone flies sporting bee-like stripes. Unlike human deception, these animals aren't consciously trying to deceive; their deceptive signals are simply baked into their morphology as evolutionary adaptations.
Tactical deception involves animals using normally honest signals in misleading ways to deceive familiar individuals. Examples include mourning cuttlefish males who display female patterns on one side of their bodies to fool dominant males while courting females, carefully choosing when to deploy this strategy based on how many males are present. Dogs also tactically deceive by leading handlers who steal food to less desirable food rewards. While these forms of deception are rare in animals, they form the building blocks for human lying, which is fundamentally different due to our capacity for language-allowing us to communicate about unlimited subjects rather than the limited topics of animal communication.
Human lying uniquely aims to alter not just behavior but beliefs, requiring theory of mind-the ability to understand others have minds with thoughts and beliefs. While most animals use behavior reading (reacting to visual cues), humans excel at mind reading, predicting others' actions by inferring their mental states. This rare cognitive ability, possibly unique to humans and perhaps some great apes, enables us to manipulate others' beliefs. When combined with language, theory of mind makes humans exceptional deceivers, as we can intentionally transmit false information to manipulate others' beliefs.
Leo Koretz ran the Bayano River Syndicate, supposedly managing Panamanian oil fields yielding extraordinary returns. His investors even jokingly called him "Our Ponzi," believing his operation legitimate despite the reference to the famous fraudster. When investors traveled to Panama in 1923, they discovered no one had heard of Bayano or Koretz. A local businessman confirmed they'd been thoroughly deceived-Koretz had run a $30 million Ponzi scheme, exceeding Ponzi himself by $10 million. Timothy Levine argues humans are "hardwired to be duped" through truth-default theory (TDT)-we typically accept communication as true, which enables efficient social coordination but makes us vulnerable to deception.
While many animals can deceive, human capacity for lying and bullshitting is unparalleled due to our unique cognitive abilities. This capacity has both benefits and severe drawbacks. Being a skilled liar correlates with social and financial success, but widespread disinformation has deadly consequences. From Nazi propaganda to Russia's Internet Research Agency spreading anti-vaccine sentiment, organized deception costs lives. Unlike animals whose deception is limited and relatively harmless, humans are wired to both dupe and be duped-a toxic combination that threatens our very existence.
第5章
Confronting Our Mortality
What do animals understand about death compared to humans? This question emerges through examples like Tahlequah, an orca who carried her dead calf for seventeen days in what many described as a display of grief. While animals from dolphins to chickens show behaviors that resemble mourning, scientists debate whether this constitutes true grief or merely anthropomorphism.
Animals may possess what philosophers call a "minimal concept of death"-recognizing non-functionality (death stops bodily functions) and irreversibility (death is permanent). This knowledge develops through experience as animals learn to distinguish between living and no-longer-living beings. However, unlike humans, animals lack awareness of their own mortality-the understanding that all living things, including themselves, must die. This uniquely human awareness of mortality, or "death wisdom," emerges in humans even from childhood, as illustrated by the author's eight-year-old daughter experiencing existential dread about her own eventual death.
The human understanding of death requires cognitive capacities that animals lack, particularly an explicit concept of time. While animals live primarily in the present-what Nietzsche called living "like a number without any awkward fraction left over"-humans conceptualize time extending into the future. Animals possess implicit time awareness through circadian rhythms tied to natural cycles like sunrise and sunset. But this biological timekeeping differs fundamentally from humans' explicit understanding of time as a concept, which allows us to contemplate our finite existence.
Mental time travel-the ability to relive past events and prelive future ones-distinguishes human cognition from animal awareness. Unlike animals, humans can vividly recall specific past experiences and imagine detailed future scenarios, even implausible ones. This episodic foresight allows us to mentally project ourselves into hypothetical situations and consider potential outcomes. While most animal planning behaviors are instinctual rather than imaginative, a few species show limited mental time travel abilities. Santino the chimpanzee famously collected and hid stones while calm to throw at zoo visitors later when agitated, and western scrub jays cached different foods in anticipation of future hunger. But even these exceptional cases are limited to immediate concerns like food acquisition, not contemplating distant futures or mortality.
The text explores how death wisdom emerged in human evolution. It introduces "Kassandra," a hypothetical first human with full mortality awareness, born to parents lacking this capacity. This awareness would have caused immense psychological trauma, yet somehow became evolutionarily advantageous. Ajit Varki suggests humans could only develop this awareness alongside a capacity for denial to remain functional. Death wisdom appears connected to our cognitive abilities like episodic foresight and mental time travel that made humans successful. Ernest Becker argued that death awareness drives human culture and "immortality projects"-from art to science to religion-as attempts to create meaning that outlasts our physical existence.
第6章
When Morality Becomes a Weapon
The chapter opens with a Nietzsche quote questioning whether animals consider humans moral beings, noting humanity is "a prejudice from which we animals at least do not suffer." It then recounts a violent 1868 incident in Sakai, Japan, where cultural misunderstandings led Japanese soldiers to kill sixteen French sailors. As diplomatic resolution, twenty Japanese soldiers were condemned to death. Rather than simple execution, they requested ritual suicide (seppuku) to die honorably. The French commander, witnessing this unfamiliar ceremony where soldiers calmly disemboweled themselves before being beheaded, was so disturbed he halted the ritual after the twelfth execution. For the remaining samurai, especially Hashizume, this mercy was considered a profound dishonor-he even bit through his tongue hoping to bleed to death. This cultural clash demonstrates how profoundly moral judgments depend on context, suggesting morality isn't a universal code but rather culturally determined behaviors shaped by evolution.
Normative behavior governs all animal societies through unspoken rules and emotional responses. Philosophers Andrews and Westra define "normative regularity" as socially maintained behavioral conformity patterns within communities. These patterns are visible in chickens' pecking order or macaques' reconciliation rituals. When norms are violated, negative emotions drive corrective behaviors that restore social order. Unlike formal morality, these animal norms operate unconsciously without requiring complex cognition like theory of mind. Humans share these unconscious norms (like not wiping a stranger's face) but have additionally developed explicit moral codes with elaborate justifications.
The dark side of human morality manifests in our ability to justify atrocities through moral reasoning. Canada's residential school system, established in 1883 under Prime Minister John Macdonald, aimed to assimilate Indigenous children by forcibly removing them from their families and cultures. Churches operated these schools where children were forbidden from speaking native languages and subjected to deplorable conditions, abuse, and disease. At least 3,200 children died, many buried in unmarked graves only recently discovered. This cultural genocide was justified as a moral imperative by government officials and religious leaders following biblical commands to "make disciples of all nations." Even Nazi SS leader Otto Ohlendorf defended murdering Jewish children as ensuring "permanent security."
While humans use moral reasoning to justify genocide, animal violence rarely reaches such systematic destruction. Chimpanzees represent the worst non-human example of same-species violence, conducting territorial battles marked by gratuitous cruelty. Yet chimp violence pales compared to human atrocities-chimps never exterminate entire rival groups, only removing select individuals. Humans, by contrast, justify killing entire cities of noncombatants to achieve "moral" victory.
Homosexuality provides another example of how human moral reasoning creates unnecessary suffering. Same-sex behavior is common throughout the animal kingdom, documented in over 300 species. In Laysan albatrosses, one-third of lifelong pairs are female same-sex couples who successfully raise offspring. About 10% of domestic rams exclusively prefer other males due to prenatal hormone exposure. Despite homosexuality being natural and non-threatening to species survival, humans uniquely developed homophobia. While some cultures like historical Japan normalized same-sex relationships, many societies criminalize homosexuality, with some imposing death penalties. This moral rejection of natural behavior has caused millions to suffer violence or death-a problem no other species creates through their normative systems.
第7章
The Question of Animal Consciousness
As autumn approaches, the author observes his honeybees preparing for winter by drying out honey and downsizing their population to ensure survival through the cold months. The colony systematically expels all drones-male bees whose only purpose is mating with queens from other colonies. These males, unable to defend the hive, collect nectar, or even feed themselves properly, become liabilities during winter scarcity. The author, feeling pity, collects these banished drones in a cardboard box with honey to give them "one final moment of happiness" before their inevitable death. This prompts a philosophical conversation with his friend Andrea, who questions whether bees can experience happiness at all, arguing they lack consciousness and "just run on instinct"-unlike her border collie, which she believes is conscious.
Consciousness is simply subjective experience-any sensation, feeling, perception or thought you're aware of. While humans have traditionally considered consciousness uniquely ours, many scientists now believe animals possess it too. The challenge lies in the "problem of other minds"-subjective experiences remain private and unmeasurable. Scientists make their case for animal consciousness through two lines of evidence: brain structures and behavior. Animals with brain regions analogous to those generating human consciousness likely experience similar states. Behaviorally, animals seeking pleasurable experiences or showing intentional behavior demonstrate consciousness.
Even insects may qualify-Lars Chittka argues bee brains create up to a billion synaptic connections, potentially generating consciousness. Their "central complex" integrates sensory information to create mental models of themselves and their environment, analogous to structures in mammalian midbrains associated with consciousness.
In a remarkable experiment, bumblebees demonstrated complex learning by moving balls to targets for sugar-water rewards-a task unlike anything in nature. When observer bees watched demonstrators move the farthest ball (because closer ones were glued down), they didn't simply copy this behavior when given their chance. Instead, they went straight for the closest ball, showing true understanding of the task's goal rather than mere imitation. Similarly, fruit flies deprived of artificially induced "orgasms" (via light-triggered neuropeptides) sought alcohol-laced food, suggesting they were aware of their decreased happiness and intentionally used substances to feel better. As Chittka noted: "Why would an organism seek out mind-altering substances when there isn't a mind to alter?"
Consciousness is best understood as a spotlight in an improv theater of the mind. On stage are numerous performers representing everything you could potentially be conscious of-sensory inputs, hunger, fear-all competing for the spotlight. When one stands in this spotlight, it generates qualia (subjective experiences) that flood across your entire mind, making that experience available to all cognitive processes. Behind the scenes are subconscious processes-like muscle memory or automatic bodily functions-that never produce qualia themselves but remain vital to the mind's operation.
Humans aren't "more conscious" than animals-we're simply conscious of more things. We have a greater number of cognitive processes that can step into the spotlight of consciousness. When considering animal consciousness, we must focus on which cognitive processes can enter their spotlight of subjective experience, not just whether they have consciousness. Animals possess different forms of self-awareness: temporal (understanding one's continued existence), bodily (awareness of one's physical form), and social (awareness of relationships with others). Importantly, these can operate unconsciously or consciously in different species.
第8章
The Problem with Foresight
Capability Brown, England's celebrated 18th-century gardener, may have inadvertently contributed to humanity's environmental problems through his landscape designs. Born Lancelot Brown in 1715, he gained his nickname from frequently telling aristocrats their estates had "great capability for improvement." Brown revolutionized garden design, replacing formal French-style gardens with naturalistic vistas featuring lakes, trees, and sprawling lawns.
His influence spread to America, where Thomas Jefferson and George Washington modeled their estates after Brown's designs. These properties, with their expansive lawns, became iconic symbols of American prosperity. While lawns were initially accessible only to the wealthy, Edwin Beard Budding's invention of the lawn mower in 1830 democratized them. Over the next century, lawns evolved into symbols of personal and national success, with the close-cropped front lawn behind a white picket fence becoming the quintessential image of American prosperity.
Americans are obsessed with lawns, covering 163,812 square kilometers (forty million acres) of domestic land-equivalent to the entire state of Florida. This monoculture wasteland provides no habitat for wildlife, wastes nine billion gallons of water daily, and contributes significantly to carbon emissions through gas-powered mowers that produce the CO2 equivalent of driving 100 miles for each hour of use.
This lawn fixation exemplifies what I call prognostic myopia: our capacity to think about and alter the future coupled with an inability to actually care about future consequences. Unlike other animals, humans can create solutions with unforeseen long-term impacts, yet our biology compels us to focus on immediate needs. The modern banana illustrates this perfectly-satisfying a simple hunger need now requires a complex global agricultural-industrial system with devastating environmental impacts. Even when we foresee negative consequences, we're not wired to truly care about them as we would immediate threats.
Our decision-making combines conscious cognitive abilities with powerful unconscious processes. Even when we think we're making rational choices, hidden heuristics often control our actions. The organ donation example perfectly illustrates this: whether people donate organs depends primarily on form design (opt-in vs. opt-out) rather than conscious deliberation. When asked why they made their choice, people confabulate elaborate justifications, unaware their decision was primarily influenced by the path of least resistance.
Prognostic myopia makes optimal decision-making nearly impossible because we're heavily influenced by immediate concerns rather than future consequences. Consider two examples from my life: First, staying up late playing music with friends despite knowing I'd be exhausted the next day. Despite intellectually understanding the consequences, the immediate pleasure and social connection outweighed my future well-being. Second, watching a Hallmark movie instead of working on urgent deadlines. Even knowing the potential professional consequences, I chose immediate gratification over long-term benefit.
The oil industry exemplifies humanity's prognostic myopia. Despite warnings dating back to 1968 when Stanford researchers told the American Petroleum Institute about carbon dioxide's role in Earth's thermal balance and predicted the greenhouse effect would cause Antarctic ice melting and sea level rise, the industry repeatedly failed to slow fossil fuel extraction. NASA's Dr. James Hansen confirmed these warnings to the US Senate in 1978, yet extraction continued increasing. Even ExxonMobil's 2014 acknowledgment of climate change risks led to no meaningful reduction.
第9章
The Paradox of Human Exceptionalism
The chapter opens with Nietzsche's quote about philosophers determining the hierarchy of values, setting the stage for an examination of human cognitive prowess and its consequences. The author introduces Eric Barcia, an amateur bungee jumper who died after miscalculating cord length, not from stupidity but from a simple mathematical error in an otherwise impressive display of human planning. This parallels NASA's Mars Climate Orbiter disaster, where unit conversion errors doomed a sophisticated spacecraft.
The author examines how human intelligence can lead to self-destructive outcomes, contrasting Barcia's fatal bungee jump with how chimpanzees like Santino lack the cognitive abilities for such complex yet dangerous activities. While Santino couldn't plan multi-day projects requiring sophisticated causal understanding, his cognitive limitations ironically protected him from deadly risk-taking. The author illustrates how intelligence sometimes produces stupid behavior, citing humans' ongoing losing battle against bedbugs despite our sophisticated solutions. Despite deploying DDT, which nearly eradicated bedbugs initially, we ultimately poisoned ourselves and future generations while creating resistant bedbug populations. This demonstrates the "Exceptionalism Paradox"-our exceptional cognition doesn't necessarily make us better at survival than simpler organisms.
By evolutionary standards, simpler cognition consistently outperforms complex human-like thinking. Bacteria, with virtually no cognition, represent the most successful life form on Earth-there are five million trillion trillion bacterial cells alive now, more than stars in the universe. Even among larger vertebrates, cognitively simple crocodilians have survived 95 million years, outlasting dinosaurs through a mass extinction event. The sea squirt actually digests its own brain after maturity, demonstrating natural selection's indifference to cognitive complexity. Simple associative learning (like Lucy the dog's reaction to moving branches) has proven remarkably effective across evolutionary time, while our causal inference abilities, despite their impressiveness, are evolutionary newcomers with a questionable future given our self-destructive tendencies.
In a conversation with his journalist friend Brendan, the author challenges conventional views about human intelligence. While Brendan argues humans are "winning" through unprecedented achievements like space exploration, atomic science, vaccines, legal systems, cities, industrialized food, the internet, and artistic creation, the author counters that these accomplishments are merely "flashes in the pan" against the billion-year dominance of simpler minds. The author suggests that evaluating success through either population numbers or species longevity is problematic since Earth will eventually be destroyed by the sun anyway. Instead, he proposes that what matters most is the maximization of pleasure and minimization of misery-the pursuit of positive qualia that drives all living things.
Seeking middle ground between philosophical value and biological fitness, the author proposes that what truly matters is pleasure-the qualia that fuel all animal life. Drawing from Jonathan Balcombe's work, he explains that pleasure drives evolution by rewarding behaviors that increase biological fitness. This aligns with utilitarian philosophies of Bentham and Mill, who positioned pleasure and pain as "sovereign masters" governing human behavior. The author suggests that success should be measured by a species' ability to generate pleasure, both for itself and for the world at large.
Are humans winning at generating more pleasure than other species? The author acknowledges his privileged position while noting that many humans experience food insecurity and live in war-torn regions with shorter lifespans. Even comparing the world's "happiest person" (Buddhist monk Matthieu Ricard) to his backyard chickens, who enjoy safety, abundant food, appropriate shelter and social grouping, the author suggests the chickens might be experiencing an equally "pleasure-soaked" existence-meaning most humans are "technically losing to my chickens at the game of life."
Humans possess a unique capacity to intentionally produce pleasure for other minds. With our theory of mind and episodic foresight, we understand how our actions affect others and could create a world maximizing pleasure for all beings. This capacity could elevate human intelligence beyond other species, yet paradoxically, we don't use it. The author contrasts Steven Pinker's optimistic view that human problems are solvable through Enlightenment thinking with philosopher John Gray's pessimistic stance that human advances are temporary and cyclical. Despite hoping for a Star Trek-like utopia with floating cities and restored biodiversity, the author acknowledges the contradiction in his own actions-driving a fossil fuel car to a climate rally while lamenting clear-cutting.
Nietzsche was wrong about cows being "fettered to the moment"-they can plan and experience melancholy. But he correctly recognized their capacity for pleasure, which likely exceeds what the tormented philosopher himself experienced. The author argues human intelligence isn't the evolutionary miracle we believe it is. Despite our moon landings and megacities, we've generated more destruction for life on Earth than any other species. Our exceptional minds paradoxically seem bent on self-destruction, and unless we find a "Pinkerian Star Trek solution," human intelligence will disappear. Rather than pitying animals for lacking human cognitive capacities, we should question their value, as human intelligence may ultimately prove "the stupidest thing that has ever happened."
