Enlightenment Now: The Case for Reason, Science, Humanism, and Progress

Pinker argues that the Enlightenment ideals of reason, science, humanism, and progress are not naive hopes but a proven value system that has delivered unprecedented improvements in human well-being. He rejects the pervasive narrative of decline—the belief that the world is falling apart, that modernity has failed, and that progress is obsolete. Pinker contends that this pessimism is not grounded in data but in evolved cognitive biases, particularly negativity bias, which makes threats and setbacks more psychologically salient than gradual improvements. Following the trend lines rather than the headlines, he demonstrates that life, health, prosperity, safety, peace, knowledge, and happiness have all risen dramatically, and he attributes these gains to the systematic application of reason and science to human problems.

Pinker roots his diagnosis of misplaced pessimism in evolutionary psychology, particularly the concept of negativity bias. He argues that in the ancestral environments where human cognition evolved, entropy dictated that more ways existed for things to go badly than well, so natural selection favored psychological mechanisms tuned to vigilantly scan for threats. This adaptive bias, while useful for survival, distorts modern perceptions: good experiences like a pain-free day go unnoticed, while rare disasters dominate attention. Pinker connects this to the second law of thermodynamics, noting that our ancestors interpreted accidents, plagues, and famines as divine wrath or demonic action because they lacked the Enlightenment insight that such events are simply entropy taking its course. The book thus uses evolutionary psychology not as a defense of human nature but as a diagnostic tool for understanding why progress is so often denied.

Enlightenment Now is explicitly positioned as a sequel to The Better Angels of Our Nature (2011), which documented the historical decline of violence. Where the earlier book focused specifically on the reduction of violence across centuries, Enlightenment Now broadens the scope to encompass all dimensions of human flourishing—life expectancy, health, prosperity, safety, peace, knowledge, and happiness. A reviewer in Science described it as an "estimable sequel" that extends Pinker's analysis beyond violence to the full range of Enlightenment-driven progress. Pinker also presents Enlightenment Now as a direct response to critics of Better Angels, defending his thesis against historians and social scientists who challenged his data and interpretations. The two books together form a comprehensive case that the Enlightenment project has worked and deserves vigorous defense.

Pinker marshals seventy-five graphs and thousands of statistics documenting improvements across multiple domains. He shows that people are living longer, healthier, freer, and happier lives, not just in the West but worldwide. Specific data include dramatic reductions in death from accidents, fires, drowning, and workplace injuries over the twentieth century, along with declines in homicide rates and the obsolescence of war between countries. He notes that war within countries is absent from five-sixths of the world's surface and that homicide rates have been falling. Pinker attributes these gains to "Enlightenment humanism," a secular worldview that values science and reason over superstition and dogma, and he argues that the solutions to remaining problems—inequality, climate change, artificial intelligence, and nuclear weapons—lie in continuing to apply the same methods that produced past progress.

Critics have raised serious concerns about Pinker's sourcing and data interpretation. George Monbiot, writing in the Guardian, identified "an astonishing mishmash of factoids, mistakes and outright myths" in the environmental sections, including misrepresenting the Limits to Growth report and misquoting ecologist Stuart Pimm about extinction rates. Monbiot also noted that Pinker relied on secondary and tertiary sources rather than primary scientific literature, and that his comparisons—such as using Nordic countries versus Afghanistan and Bangladesh to support the Environmental Kuznets Curve—ignored the full ecological footprint picture, where Nordic countries perform far worse per capita. A separate critique documented Pinker quoting political economist Eric Zencey out of context to mean the opposite of what Zencey intended, and misrepresenting the views of scholars on nuclear fusion and food security. Historians contributing to a special issue of Historical Reflections criticized Pinker's engagement with their critiques of Better Angels as disingenuous.

Reception has been sharply divided. Popular audiences embraced the book: Bill Gates declared it "my new favorite book of all time," and it became an instant New York Times bestseller and a Notable Book of 2018. A Science review called it "the most uplifting work of science I've ever read." However, academic and journalistic critics were severe. Library Journal described it as "fascinating yet frustrating," and Publishers Weekly noted Pinker's defense of progressive ideals against "cantankerous philosophers and populist politicians." The most substantive critiques came from environmentalists and historians who documented factual errors, misleading quotations, and selective use of evidence. George Monbiot argued that Pinker's book was "an affront" to the very Enlightenment values it claimed to champion, accusing it of straw man fallacies and cherry-picking. The divide reflects broader tensions between popular science writing and disciplinary rigor.