## Definition **The Four Enlightenment Ideals** are the four organising values that Steven Pinker, in *Enlightenment Now* (2018), identifies as the causal engine of two-and-a-half centuries of human progress: **Reason**, **Science**, **Humanism**, and **Progress**. Pinker argues that these ideals, emerging from the 18th-century Age of Reason, are not cultural relics but live principles whose continued application explains — and whose erosion would reverse — the measurable improvements in human welfare since 1800. ## The Four Ideals **Reason** is the most fundamental of the four. For Pinker, reason is not the claim that every individual is always rational; it is the commitment to using evidence, logic, and open debate to discover truth and justify beliefs. Reason stands in opposition to faith, dogma, magical thinking, and charismatic authority. Its most important expressions are institutional: free speech norms, peer review, empirical testing, and the public accountability of claims. **Science** refines and extends reason through a specific methodology. Pinker identifies two core scientific ideals: (1) the world is comprehensible — phenomena can be explained by principles deeper than themselves; and (2) the world must be allowed to falsify our beliefs — evidence, not authority or revelation, decides. The Scientific Revolution, which preceded the Enlightenment by roughly 150 years, began the escape from magical thinking and error. Science does not require scientists to be infallible; it requires that the institution create mechanisms (peer review, double-blind trials, open replication) that systematically reduce the error rate of the collective. **Humanism** grounds morality in the wellbeing of individual sentient beings rather than in the glory of tribes, nations, or divine commands. The Enlightenment thinkers established a secular moral foundation: since individuals are the beings who actually experience pleasure, pain, flourishing, and suffering, it is individuals — not abstractions — whose interests must be weighed. Combined with reason's pressure toward impartiality ("nothing is special about *me* that entitles me to a different moral standard"), humanism naturally expands its circle of moral concern toward cosmopolitanism. **Progress** is the empirical claim that human wellbeing is not fixed, that it has improved systematically over two centuries across measurable dimensions (health, wealth, safety, literacy, freedom, happiness), and that this improvement is causally linked to the application of reason, science, and humanist values. Progress is not inevitable or automatic; it is the result of sustained effort against entropy and human cognitive limitations. See [[Progress as Empirically Measurable (Pinker)]]. ## The Conceptual Backdrop: Entro, Evo, Info Pinker anchors the four ideals in three scientific frameworks that the original Enlightenment thinkers lacked: - **Entropy** (the Second Law of Thermodynamics): disorder is vastly more probable than order; sustaining any valued state requires continuous effort and energy input. See [[The Second Law as Backdrop to Human Progress]]. - **Evolution**: human cognitive and moral faculties were shaped by selection for survival in small tribal groups, not for reasoning about global statistics or strangers. Our default biases — tribalism, negativity bias, magical thinking — are adaptations to an ancestral environment. Reason and institutions are correctives. - **Information**: the brain processes sensory signals into useful patterns; knowledge consists of neural patterns correlated with physical patterns in the world. The human cognitive niche — abstraction, language, cooperation — allowed the accumulation of knowledge across generations, the engine of all progress. ## Why the Ideals Are Under Threat Pinker documents two recurring sources of opposition. The first is the **counter-Enlightenment**, which emerged simultaneously with the Enlightenment itself (Romanticism) and recurs in religious fundamentalism, nationalist populism, and postmodern anti-science. These movements are, in Pinker's characterisation, "tribalist rather than cosmopolitan, authoritarian rather than democratic, dismissive of experts, nostalgic for an idealised past." The second is **progressophobia**: the cognitive and institutional biases (negativity bias, media incentives toward catastrophism, expanding moral circles that surface more problems) that make it psychologically difficult to perceive progress even when it is occurring. ## Related - [[Progress as Empirically Measurable (Pinker)]] - [[Humanism (Pinker)]] - [[The Second Law as Backdrop to Human Progress]] - [[Critiques of the Enlightenment (Pinker)]] - [[Entropy and the Arrow of Time]] ## Sources - [[Enlightenment Now (Pinker 2018)]]