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Steven PinkerA modern alternative to SparkNotes and CliffsNotes, SuperSummary offers high-quality Study Guides with detailed chapter summaries and analysis of major themes, characters, and more.
Pinker explains that in Part 3 he’ll defend Enlightenment ideals from various naysayers, from populists to left-wing intellectuals and cultural pessimists. He begins by examining a misconception about Enlightenment thinkers: They didn’t, as many believe, argue that humans are entirely rational but rather that we’re often irrational and therefore should rely on reason more often. Pinker claims that nowadays even those who prefer feeling to thinking, or believe that trying to rationalize with people is futile, tend to defend their arguments with personal reasons rather than data, undermining their point. Much evidence shows how people can be irrational, from availability bias to confirmation bias and stereotyping, but we can still employ reason when we want to.
Kant, Spinoza, Hume, and Smith argued that people “ought to be rational” (353) and employ free speech, empirical testing, and logic, no matter how difficult. Pinker explains that while we have other primal instincts, we’re “a cognitive species that depends on explanations of the world” (353). Although “vulnerable” to fallacies, humans routinely question and correct them. Pinker explains why humans are “so easily led into folly” (355). He denies that poor education is the main reason that people embrace irrational ideas. Instead, he argues, values and beliefs play a major role in strengthening social bonds, which people care more about than the accuracy of their ideas—and the more outlandish a claim, the more bonding it can be. As examples of ludicrous, unfounded claims serving as a bonding tool among like-minded people, Pinker cites Republican claims that Hillary Clinton had multiple sclerosis and used a body double and that Barack Obama played a role in the 9/11 attacks. While conspiracy theorists may genuinely believe these claims are true, most people see them as “identity-protective cognition” bias that spreads lies “for the benefit of the in-group” (359).
Other factors in human thinking that steer us away from reason are “motivated reasoning,” or trying to steer an argument to a certain end, and “my-side bias” (359). For example, people tend to notice more penalties committed by an opposing team than their own. Pinker sees many parallels between political engagement and sports teams: Both groups tend to seek information to “enhance the fan experience” (360) instead of prioritizing accuracy. Even educated and astute people can be blinded by their political bias in psychological tests. This extends to the researchers’ bias about themselves—they sometimes fall prey to “bias bias” when designing and reporting their studies.
Pinker explores how people of different political backgrounds perceive history and the world. He argues that populist movements tend to idealize the past and employ declinist arguments to persuade people that their nations have “careened out of control” and “abandoned the moral clarity of traditional Christendom” (363). Pinker refutes unfounded nostalgic claims that life was somehow better in the past, reiterating the findings in the earlier parts of his book. He claims that leftists, too, often misunderstand the world, usually through their unappreciation for the benefits of industrial capitalism and their “romance with Marxism” (364). He accuses leftist intellectuals of lacking nuance in assessing capitalism, since a free market that is regulated and works in tandem with protective legislation and high social spending, though often elusive, is possible.
In contrast, right-wing US politicians have embraced simplistic mandates by demonizing regulation, social spending, and tax hikes, framing these everyday matters as a threat to liberty. Pinker considers left-wing Marxism and right-wing libertarianism equally unsupported by historical data and points to Western Europe, Canada, and New Zealand as examples of countries with free markets and higher social spending that “trounce the US in every measure of human flourishing” (365). Pinker argues that the best way to ensure continued progress is to view society as an open-ended experiment and apply the “best practices” we’ve learned so far: “guaranteed rights, market freedom, social spending, and judicious regulation” (365).
Pinker laments that the many commentators who make a living writing opinions and predictions often forgo fact-checking and thus share unfounded opinions; they often embody “identity-protective cognition” bias (359). The author describes a multi-year study that tested people’s ability to accurately forecast events and found that those with ideological right-wing or left-wing ideas were more often drawn to absolutes and were poor at making accurate predictions. People who are able to make accurate predictions are typically more intelligent, don’t align themselves closely with political extremists, and are good with numbers. Pinker adds that they’re curious, open-minded, willing to consider other ideas and question their biases, tend to believe in the “wisdom of crowds” (370), and are thus interested in feedback from others. In addition, they’re often extremely skeptical of the role of “fate.” Pinker uses this study to argue that politicization is a “major enemy of reason” (371).
The author notes that US politics have become increasingly polarized, and people are more socially segregated based on their political views. Additionally, people from different political parties often have unfavorable views of the other party and are unwilling to compromise. Another development has been the liberalization of universities and academics, so left-wing and liberal people now vastly outnumber conservatives. Pinker claims that while universities are often naturally more liberal than the general population, the skewed demographic has suppressed the open sharing of ideas. Ironically, Pinker believes that this development has caused some universities to become “aggressively illiberal” because some students and professors are intolerant of others sharing their opinions (373). Pinker cites numerous instances of people at universities being verbally abused for sharing an unpopular opinion as evidence.
In addition, he argues that some right-wing commentators are biased against universities in general and are suspicious of the research they produce. Pinker notes that while universities are imperfect, they provide helpful research that is cited and peer-reviewed, unlike less reliable forms of opinion-sharing. Pinker condemns the Republican party for violating democratic norms to obtain power by gerrymandering, blocking supreme court nominations, and supporting populist ideas. The author argues that regardless of differences in opinion, “the mechanisms of democratic deliberation should be sacrosanct” (374). He laments the growing political polarization and urges contribution to an “intellectual culture that is driven by reason rather than tribalism and mutual reaction” (375).
Pinker reiterates that humans are capable of reason and, therefore, capable of distinguishing truth from lies. Despite the startling number of falsehoods that politicians share, Pinker finds encouragement in projects like PolitiFact, which fact-checks politicians’ claims. Some double down on their claims but later back down when a “tipping point” comes as evidence based on reason and data is too overwhelming to refute. Pinker cites climate change debates as an example. Psychologists are developing “debiasing” programs, which Pinker hopes will encourage the objective, analytical thinking required to overcome bias. Implementing rules of discourse before discussions or agreeing to empirical tests can encourage rational thought.
The author claims that while people are seemingly becoming less rational, we’re as reasonable as ever. He cites evidence-based progress in medicine, psychotherapy, policing, and the media as indicators that many people value reason’s role in decision-making. Electoral politics are the “flaming exception” because it tends to reinforce irrational thinking and give the spotlight to the loudest—not the most reasonable—commentators. Pinker argues that when pundits present issues in a more neutral, depoliticized manner, people can make more reasonable judgments about them. To conclude the chapter, he reiterates, “If we can identify ways in which humans are irrational, we must know what rationality is” (383).
Pinker calls science the greatest human achievement and celebrates how much knowledge it has produced. In addition to answering important questions about the universe and nature, science has helped us gain “life, health, wealth, knowledge, and freedom” (386). For example, science helped eliminate smallpox, a terrible illness that killed 300 million people in the 20th century. Pinker claims that science is “underappreciated” by people across the political spectrum. Leftists accuse science of offering a reductive view of humanity and encouraging oppressive policies like eugenics. The political right takes issue with scientists’ interest in empirical proof, arguing that it dehumanizes people by denying the soul’s existence and trying to replace religious understandings of the world.
The author addresses a subset of liberal intellectuals he calls the Second Culture, who loathe “scientism,” which they perceive as an ideology that prioritizes science over other disciplines. Pinker clarifies that thinking scientifically doesn’t imply giving scientists all societal power (he’s even critical of scientists’ knowledge of other disciplines); it means thinking more rationally and being open to hypotheses failing. Pinker notes that identifying failed hypotheses doesn’t delegitimize science in any way but simply supports its proof-based approach. He laments that many people don’t understand the scientific method, and he advocates for more scientific literacy and a better understanding of how science can contribute to society and other academic disciplines.
Attempts to limit scientists to the material world and restrict them from commenting on society’s morals and values are illogical and misguided. Philosophers don’t consider only abstract ideas but also material reality. Pinker notes that Enlightenment thinkers didn’t limit their arguments to specific disciplines but touched on emotions, cognition, and perception all in one argument. He argues that while science approaches everything as intelligible, this shouldn’t be confused with reductive thinking. Furthermore, while scientific knowledge may not be the most relevant in some analyses, such as the primary causes of World War l, it’s useful in understanding biases and mindsets. Science is always open to testing and questions—and adjusts its theories according to new evidence.
Pinker refutes the notion that only religion and philosophy can tackle life’s “big questions.” Science has helped us understand the origins of the universe and our species—and has even helped answer existential questions. Some liberal intellectuals, however, don’t consider science as pursuing the truth but as another subjective lens to view the world. Others claim that science is often weaponized as a tool of oppression, even blaming it for the Holocaust. Pinker notes the absurdity of this argument, emphasizing that the Nazis were anti-Enlightenment and didn’t employ reason in their ideology, instead favoring an “organic, pagan vitality” (396) to justify their atrocities.
The author admits that those in power have sometimes used science as a tool of oppression and that some scientists are to blame for their participation. However, he argues that understanding the history of poor science is important. Scientific racism taught that different races of people had varying intellect and deemed Northern Europeans the most intelligent; however, more objective science reversed this thinking in the mid-20th century. These ideas weren’t exclusive to science, though: Pinker notes that historians and writers contributed ill-founded narratives to scientific racism too. Writers Arthur de Gobineau, Richard Wagner, and Houston Stewart Chamberlain all spread racist, antisemitic beliefs, which eventually inspired Hitler. However, Hitler didn’t accept Charles Darwin’s theory of evolution and natural selection because it didn’t support his views on racial hierarchy.
Pinker notes that science didn’t invent scientific racism or the practice of eugenics—and that scientists played a role but weren’t completely at fault for the movement. “Positive eugenics,” or encouraging talented people to have children together, was first proposed by Francis Galton and later morphed into the “negative eugenics” of forced sterilization. Eugenics was later “permanently discredited by its association with Nazism” (399). The author points out that many liberals of the time supported eugenics as a form of government planning and social responsibility. Pinker’s analysis of the accusations against science aims to clear the air around some of science’s supposed failings and help contextualize these claims. His defense casts scientific oppression as a rare exception rather than the rule of that discipline.
In addition, Pinker attacks other forms of anti-science ideology, including the increasing bureaucracy surrounding medical research and drug development. According to Pinker, bioethicists have created too many restrictions around medical studies and are impeding scientists’ ability to develop new treatments. Furthermore, people in professions such as diplomacy and journalism put too much stock in intuition and expert opinion and not enough in data and evidence.
The author comments on the decline of the humanities, noting that educating fewer students in these important disciplines is a loss to universities. However, he claims that some intellectuals immerse themselves so deeply in pessimistic evaluations of society that political correctness and relativism confine their thinking. Pinker advocates for a more interdisciplinary approach that could enrich both the sciences and the arts. He refers to archaeology and linguistics as fields that often combine scientific understanding with artistic and cultural interpretation.
In the last chapter, Pinker addresses the third facet of Enlightenment thinking that fuels progress: humanism. Pinker argues that science and reason alone won’t help society progress; we need to direct these pursuits toward humanistic goals. Pinker defines humanism as “the goal of maximizing human flourishing” (410) and calls it an indicator of genuine progress, rather than a practice of simply mastering knowledge or inventions for no specific purpose. Pinker claims that humanist groups are growing and notes that religious congregations increasingly downplay traditional theology in favor of more humanistic preaching, citing Quakers, Nordic Lutherans, and some Jewish humanist groups as examples. Pinker agrees that humanism can seem “bland” but argues that it’s a “distinctive moral commitment” (412) that people must work at. Enlightenment thinkers advanced humanism by arguing for “morality in impartiality” (412)—the concept that giving oneself privilege over others is unreasonable. Spinoza, Hobbes, Kant, Rawl, and Nagel all included this kind of morality in their work, which Pinker notes is similar to the Golden Rule in moral codes around the world. Pinker claims that we can—and should—go further than this approach and clearly lay a “deeper foundation” for human morality. These reminders emphasize the theme The Origins and Influence of Enlightenment Thinking, reaffirming how these thinkers helped shape society for the better.
Because humans are the product of millennia of evolution, we can appreciate the many factors that informed our survival and evolution as a species. Among these are the basic needs that people, as animals, must seek, including “food, comfort, curiosity, beauty, stimulation, love, sex, and camaraderie,” because “if people didn’t seek them, there would be no people” (414). Pinker frames people and their pursuits through an evolutionary lens to emphasize that these activities are basic needs, and not indulgences. However, “ascetic and puritanical regimes” (414) often deny people basic needs by stigmatizing these activities. In contrast, humanism acknowledges the necessity and value of these activities and notes that without them our species wouldn’t exist. In addition, Pinker notes that though humans are vulnerable to violence, violence in society is a “solvable problem,” as evident in its decline over history. Everyone who can think is involved in morality; even “sociopaths” can be persuaded to follow certain moral codes if society makes it difficult enough for them to indulge their violent impulses. Another facet of our evolution, sympathy, is likewise a key part of secular morality. We evolved to feel sympathy—as well as trust, gratitude, guilt, and righteous anger—because these feelings strengthen the social bonds we rely on for survival.
Pinker next addresses the criticism that humanism is too utilitarian—and therefore simplistic—about maximizing happiness for the greatest number of people. Humanism has some utilitarian leanings, but Pinker argues that we can “embrace a broader sense of flourishing” (416), such as education, childhood, and fulfilling experiences, in our evaluation. He reiterates that human rights promote human flourishing, so humanism and human rights “go hand in hand” (416). Humanists can be proud of overlapping with utilitarianism because that philosophy has championed progress such as emancipation, women’s rights, and animal rights. Utilitarians believe that people should be free to pursue their interests and practices if they don’t hurt anyone else. Conversely, deontologists tend to root their beliefs in tribalism, notions of purity, and maintaining social norms—and are thus more likely to ban certain behaviors even if they don’t hurt anyone.
Pinker argues that diverse and cosmopolitan societies should base their moral codes on “simple, transparent principles that everyone can understand and agree upon,” such as the “ideal of human flourishing” (417). He observes that when diverse groups must agree on shared norms, they tend to follow humanistic principles; he points to the UN Declaration of Human Rights as an example. According to Pinker, humanism is a better choice than theistic morality or romantic heroism, which may manifest in the alt-right, neo-fascism, and authoritarian populism.
Some intellectuals believe that humans inherently need “theistic, spiritual, heroic, and tribal beliefs” (419), rendering humanism not necessarily wrong but “unnatural.” Therefore, these intellectuals argue, societies based on humanism will inevitably fall. Pinker notes that recent articles in The New York Times and The Boston Globe claim our society is in decline because an Enlightenment-inspired system neglects people’s emotional and spiritual needs. Pinker repudiates theistic morality, explaining that humanism and religious instruction both encompass the same beneficial moral codes. Moreover, no well-founded reasons exist to believe in God or gods, and scriptures tend to contain “internal contradictions, factual errors […] and scientific absurdities” (421). While people who adhere to theistic morality want to keep it separate from science, Pinker argues that scientific reason can—and should—apply to anything. For example, if prayer worked, we could observe that people who pray daily are free from illness and bad luck, while those who don’t suffer. Pinker acknowledges that some people believe God doesn’t intervene in human life or that God is the same as the laws of the universe, but he argues that these gods are “impotent,” and we should imbue them with moral authority.
The author then confronts two theistic arguments. The first is that physics hasn’t explained how the universe’s forces developed so perfectly that they allowed life and human existence to emerge. Pinker counters this claim by wondering why a god would create the universe to populate it with life but also include so many dangers and disasters. Furthermore, he claims, physicists are closer to explaining the “fundamental constants” that make life possible. While people sometimes find scientific discoveries difficult to comprehend or even offensive, Pinker emphasizes that our “cognitive queasiness is a poor guide to reality” (424) given that many previously offensive findings have been proven true. The other theistic claim Pinker tackles concerns how consciousness is possible. He explains that scientists and evolutionary psychologists have satisfying explanations and that Darwinian adaptation enabled us to develop complex senses and instincts to satisfy our needs for survival. Systems within the human brain constantly access shared information and work together to inform our behavior. Neural networks fire and link the brain’s cortexes together to continue this constant exchange of signals. For Pinker, the existence of consciousness doesn’t require an explanation including souls, psychics, telepathy, or any other unproven phenomena: “Nothing that we know about consciousness is inconsistent with the understanding that it depends entirely on neural activity” (427). This can be hard to grasp because “the mind has nothing but itself to know itself with” (428). Moreover, solving the “problem” of consciousness by introducing the concept of a soul only clouds the matter because it seeks to “solve a mystery with an even bigger mystery” (428).
Pinker follows up this argument by pointing out that even if we could prove that gods exist, we’d have little reason to look to them for a moral compass. He refers to the angry and violent god of the Old Testament to show that we wouldn’t gain in morality by following a deity who finds “nothing particularly wrong with slavery, rape, torture, mutilation, and genocide” (428). Of course, most modern believers don’t endorse these actions because they “read the Bible through the lens of Enlightenment humanism” (429). Religion can, however, prompt immoral behavior, such as violence against nonbelievers. By dictating sacred values and being unwilling to compromise, religions stir conflicts. Pinker notes that numerous religious wars killed a total of 55 million people and argues that “if religion were a source of morality, the number of religious wars and atrocities ought to be zero” (430). By discussing these negative scriptures and events, Pinker seeks to break any association between religion and morality—and thereby emphasize the benefits of humanist thinking, which doesn’t require belief in a deity to help others.
Next, the author attacks “faitheism,” or nonreligious people’s defense of faith, which argues that religion is natural or instinctive and encourages community and altruism. Pinker acknowledges that some faith-based movements and organizations have provided helpful services like education, charity, and medical care and that we can celebrate these actions. However, secular societies can provide such services too and have done so at greater rates than religious organizations or societies. If religions deserve praise for sometimes supporting humanism, “they should not be shielded from criticism when they obstruct those ends” (432) by limiting science education or suppressing stem cell research or HPV vaccinations. Pinker emphasizes that religious followers don’t necessarily embody their religion’s stated foundations, such as Christianity’s humility, forgiveness, and compassion. Pinker’s claim that 80% of white evangelical Christians voted for Trump underscores this contradiction.
Pinker rejects the notion that only religion can offer meaningful explanations for life, calling religious answers to existential questions “shallow and archaic” (433).
Similarly, he criticizes “spirituality” that looks for meaning in coincidences and claims that the events of the universe are personal and derive from a kind of divine order. According to Pinker, the fact that the laws of the universe don’t care about individuals doesn’t make life “meaningless” since their family, friends, and community care about them—and people with “humanistic sensibilities” can extend basic care to any sentient being, making life more meaningful. In addition, Pinker notes that people aren’t re-embracing religion; in many countries, atheists outnumber religious people, and faith is declining in Eastern Europe. Long-term studies have shown that nations such as Canada, Australia, and New Zealand have become less religious over the generations. Even in the US, a more religious developed nation, rates of religious adherence are declining. Pinker explains an interesting connection between religious adherence and politics: Religious people are more likely to vote than secular people. Pinker attributes this to the organized nature of religion and the persuasive power it uses to direct people’s behavior. The author cites several reasons to explain the overall decline of religion, including an increase in affluence and better education. He emphasizes the inverse correlation between religious adherence and standard of living: Irreligious countries tend to have a high standard of living, while highly religious countries tend to have a lower standard of living. As in previous passages, Pinker contrasts reason with religion and urges consideration of the connections between rationality and secularism.
Pinker notes that human flourishing isn’t progressing as quickly in Islamic nations as in the rest of the world. These nations tend to score lower on education, human rights, freedom, health, and happiness and more often go to war and implement cruel punishments for law violations. Pinker argues against attributing this reality entirely to the religion itself, and he points to Islamic societies’ historical contributions to science and cosmopolitanism. However, some who practice “regressive customs” like female genital mutilation wrongly label them as part of Islamic law. Furthermore, violent intervention from Western countries in the Ottoman empire, the support of mujahideen in Afghanistan, and the invasion of Iraq have worsened the situation.
Nevertheless, Pinker insists that some of these regions’ issues are traceable to problems inherent in religious belief. He claims that the Quran encourages anti-humanist practices: It contains literal instructions to administer the death penalty for religious crimes like alcohol consumption, adultery, and gay sexual orientation. Furthermore, the scriptures preach sexual servitude and crucifixion for non-believers, similar to some of the Bible’s anti-humanist teachings. Pinker claims that debating which scriptures are worse is irrelevant; “what matters is how literally the adherents take them” (440). He laments that the “benign hypocrisy” that caused Jews and Christians to reject the more violent aspects of their scriptures isn’t as common in the Islamic world. In addition, more than 80% of surveyed Muslims consider themselves strongly religious, and over half believe that only one correct way exists to interpret the Quran: to interpret and follow it literally. Pinker connects this religiosity—and the commitment to literal interpretations—with anti-humanist behavior and argues that these trends were once true of Christianity until the Enlightenment shifted people’s perspectives and changed their scripture interpretations.
In the West, some non-Muslims have become “strange apologists” for oppression in Islamic countries to prevent prejudice and hatred against Muslim people and resist a “destructive” narrative about the clash of civilizations. However, Pinker insists that identifying the anti-humanist beliefs or practices in Islam isn’t “Islamophobic” and points out that the “overwhelming majority of victims of Islamic violence and repression are other Muslims” (441). Pinker refers to a long list of Muslim intellectuals who are advocating for humanist reforms in Islamic countries, encouraging optimism that these nations can enjoy their own Enlightenment and the human flourishing that should follow it. This nuanced account of Islamic societies balances Pinker’s respect for humanistic strains of Islamic culture with confronting anti-Enlightenment movements in the Islamic world. By referring to the dozens of Muslim intellectuals advocating for humanist reform, Pinker avoids generalizations about Muslims and ends the discussion on an uplifting note.
Pinker next focuses on another enemy of humanism: romantic heroism. He claims that Nietzsche articulated the concept in his philosophy, which celebrates a “superman” who finds “heroic glory” through power in which good and evil are irrelevant. Pinker includes various quotations in which Nietzsche advocates for violence against anyone “degenerate and parasitical” (445) and condemns humanism. Pinker blames these philosophies for inspiring the world wars and Nazism, and he laments that Nietzsche continues to garner admiration. Many artists found his beliefs appealing because they elevated the artist, alongside the warrior, as admirable. Pinker accuses some intellectuals of using Nietzche’s beliefs to excuse various dictators’ atrocities and romanticize their leadership. Bringing his analysis to the present day, Pinker claims that Nietzsche influenced Trump advisors Stephen Bannon and Michael Anton, who endorse views that cosmopolitanism and multiculturalism threaten national identity and greatness, recoiling at the idea of modernity and instead idealizing the past. These ideas manifested in Trump’s rejection of immigration and unwillingness to cooperate on global climate agreements. By condemning politicians and advisors by name, Pinker gives his work an assertive tone and helps clarify what he considers modern manifestations of anti-Enlightenment thinking.
Pinker refutes the notion that ethnic nationalism is somehow natural, calling it “bad evolutionary psychology” (450). Throughout most of history, nation-states were nonexistent, and while people are vulnerable to tribalism, what we see as a tribe varies widely. Furthermore, the notion that “ethnic uniformity” somehow produces “cultural excellence” is erroneous; Pinker argues that the most vibrant cultures have been trade cities where many different kinds of people crossed paths and exchanged goods and ideas (450). He’s hopeful that our own culture will continue to become more cosmopolitan: “The advantages of cosmopolitanism and international cooperation cannot be denied for long in a world in which the flow of people and ideas is unstoppable” (451). By contrasting the closed minds of tribal thinkers with the more open-minded people interested in new ideas and willing to compromise, Pinker visualizes an “unstoppable” wave of progress in our interconnected world. This claim helps create a sense of hope for the future.
Pinker concludes his work by imploring journalists, intellectuals, and others not to cave to pessimism and other counter-Enlightenment thinking: “Don’t confuse pessimism with profundity: problems are inevitable, but problems are solvable, and diagnosing every setback as a symptom of a sick society is a cheap grab for gravitas” (452). Enlightenment thinking belongs to all of humanity because anyone can agree that life, health, abundance, freedom, happiness, and knowledge are worthwhile goals for all societies.
By Steven Pinker
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