Francis Bacon: The Lord Chancellor Who Redesigned the Method of Knowledge

Key Points of This Article

• The Four Idols: Four “idols” that structurally distort the human intellect—Idols of the Tribe (biases shared by all humankind), Idols of the Cave (distortions arising from individual temperament, education, and environment), Idols of the Marketplace (the contamination of thought by language), and Idols of the Theatre (the way entrenched doctrines mask facts). A systematic diagnosis of cognitive impairment, developed in Book I of the Novum Organum.
• Induction and the Novum Organum: A “new instrument” to replace Aristotle’s deductive Organon. Data from observation and experiment are organized into Tables of Presence, Tables of Absence, and Tables of Degrees; causes are then narrowed by exclusion and comparison. The prototype of modern scientific methodology.
• The Great Instauration (Instauratio Magna): A grand plan to reorganize the totality of knowledge in six parts. Though left unfinished, its conception of science as a matter of method and institution—rather than individual genius—cast a long shadow from the Royal Society to the modern research university.

Life and Historical Context

Born January 22, 1561, at York House on the Strand in London. His father was Sir Nicholas Bacon, Lord Keeper of the Great Seal under Queen Elizabeth. His mother, Ann, was a learned woman fluent in Greek and Latin who translated the works of Calvin into English. Power and scholarship were the air at the family table.

At twelve he entered Trinity College, Cambridge. There he received an education in Aristotelian philosophy, but would later recall that “the philosophy taught at Cambridge was nothing but barren disputation, bearing no fruit.” He left after little more than two years without taking a degree and crossed to France as part of the suite of the English ambassador. He learned the subtleties of power on the ground of diplomacy, but in 1579 his father died suddenly. As a younger son, his inheritance was slight. He entered Gray’s Inn to qualify as a lawyer, and the career in law began.

From 1584 he sat in Parliament. He attached himself to Robert Devereux, Earl of Essex, as a political patron, but when Essex led a rebellion against the Queen in 1601, Bacon joined the prosecution and helped secure the conviction of the man who had once been his benefactor. Ungrateful traitor, or lawyer who placed the demands of law above personal loyalty? Opinion remains divided.

In 1603, the accession of James I changed everything. Bacon rose rapidly: Solicitor General in 1607, Attorney General in 1613, Lord Keeper in 1617, Lord Chancellor in 1618. He stood at the summit of England’s judiciary. The summit lasted three years.

In 1621, impeachment. It came to light that he had accepted gifts from parties in litigation. Bacon admitted the facts and wrote: “I was the justest judge that was in England these fifty years; but it was the justest censure in Parliament that was these two hundred years.” In truth the evidence that gifts swayed his judgments was thin, and the affair was entangled in the deeper political struggle between King and Parliament. But the stain would not wash out. He spent his remaining five years writing, and died on April 9, 1626, aged sixty-five. According to John Aubrey’s Brief Lives, he fell ill while conducting an experiment on preserving meat with snow. Whether or not the story is true, the fact that a legend of hands-on experiment clings to his last hours sums up his life.

Timeline

• 1561: Born at York House, London
• 1573: Enters Trinity College, Cambridge, at twelve
• 1576–79: In France as part of the ambassador’s suite
• 1584: First elected to Parliament
• 1597: Essays first edition (10 essays). “Knowledge is power” in Meditationes Sacrae
• 1605: The Advancement of Learning published
• 1618: Appointed Lord Chancellor; created Baron Verulam
• 1620: Novum Organum published as Part II of the Instauratio Magna
• 1621: Impeached for bribery; falls from power
• 1623: De Dignitate et Augmentis Scientiarum published
• 1626, April 9: Dies at Highgate, near London
• 1627: New Atlantis published posthumously

What Did This Philosopher Ask?

The starting point was exasperation. In the nineteen hundred years since Aristotle’s death, how much certain knowledge of nature had actually been added? Almost none. Navigation, gunpowder, and printing—three inventions unknown to the ancients, whose very inventors were unknown—had changed the world. Yet they were accidents, not victories of method (Book I, Aph. 129). The syllogism was a weapon for winning school debates, not a tool for uncovering laws of nature. “The syllogism is utterly inadequate to the subtlety of nature” (Aph. 13). If the major premise is correct, the conclusion follows—but where does the all-important major premise originate? From authority? From custom? From gut feeling? All of them dubious.

Existing philosophy was cut into three species and dispatched (Aph. 62). Sophistical philosophy—spinning concepts without grounding in experience; Aristotle was the prime example. Empirical philosophy—rushing from a handful of experiments to a grand system; the alchemists were the archetype. Superstitious philosophy—importing theology into the study of nature; parts of the Pythagorean school and of Plato fell under this heading. None of them listened to nature on nature’s terms.

So why had method remained broken? The problem, Bacon judged, lay not in method alone. The human intellect itself was cracked. People trusted the image in a warped mirror. Unless one first recognized the warp, any observation would yield warped results. Diagnosis before treatment—three centuries earlier, Roger Bacon had attempted something similar with his “four obstacles” in the Opus Majus. Francis refashioned the idea in a far more rigorous form.

Core Theories

1. The Four Idols: Why Humans Go Wrong

Novum Organum, Book I, Aphorisms 39–68. Bacon classified the causes that distort the human intellect into four groups and named them “idols”—idola. False images that the mind worships without knowing it does so.

Idols of the Tribe (idola tribus). Distortions common to the human species as such. The senses are imperfect: the eye sees distant objects as smaller than they are. The intellect craves order, overvalues evidence that suits it, and ignores evidence that does not (Aph. 46). Bacon gave an example. A man is shown a painting of people who survived a storm at sea and offered votive gifts at a temple. He concludes that prayer saves lives. But the drowned leave no votive offerings. Survivors’ data fill the eye; the dead leave no trace. Confirmation bias and survivorship bias—phenomena modern psychology would only name centuries later—are already there in this single passage.

Idols of the Cave (idola specus). Distortions arising from individual temperament, education, experience, and reading habits. The name comes from Plato’s Allegory of the Cave. Each person digs a private cave and refracts the incoming light. One of Bacon’s examples was Aristotle himself: he subordinated natural philosophy to logic and cut the world with the tool he happened to be good at (Aph. 54). The physician William Gilbert, having started from his research on magnets, tried to explain the entire cosmos through magnetism (Aph. 54). One’s area of strength comes to look like the frame of the world itself.

Idols of the Marketplace (idola fori). Language contaminates thought. Misunderstandings born of the dealings people conduct in the marketplace of speech. Bacon called this the most troublesome idol of all (Aph. 59). The problem is twofold. First, names are given to things that do not exist, and the mere existence of a word creates the illusion of a corresponding reality: “Fortune,” “the Prime Mover,” “the element of Fire”—Bacon pronounced them empty names. Second, existing things are carved up imprecisely by words. A single word like “moist” collapses entirely different phenomena—the fluidity of water and the adhesiveness of paste—into one label (Aph. 60). Vague words become stand-ins for thought.

Idols of the Theatre (idola theatri). Philosophical systems stage-manage reality as though it were a theatrical script. Aristotelianism, Platonism, Scholasticism—a self-contained system excludes data that refuse to fit, precisely because the system is self-contained. What Bacon attacked was not any particular doctrine but the intellectual closure that occurs whenever doctrine hardens. Thomas Kuhn, arguing in The Structure of Scientific Revolutions (1962) that normal science operates within the grip of a paradigm, was treading ground Bacon had surveyed first.

2. Induction and the Three Tables: Extracting Laws from Nature

The Novum Organum—“the new instrument.” The title itself was a declaration of war. Where Aristotle’s Organon (the old “instrument”) served deduction, Bacon offered an instrument for discovery. The concrete procedure unfolds chiefly in Book II.

Bacon’s induction is not simple enumeration. For a given quality—heat, for instance—one constructs three tables. A Table of Presence (tabula essentiae et praesentiae): instances in which heat appears. Sunlight, friction, volcanoes, the fermentation of dung. Bacon listed twenty-seven cases. A Table of Absence (tabula declinationis sive absentiae in proximo): cases resembling the first set but lacking heat. Moonlight resembles sunlight yet is not hot. A Table of Degrees (tabula graduum): cases in which heat increases or decreases. Animals grow hotter with exercise and cooler at rest. Cross-referencing the three tables, one eliminates candidates that fail to fit. Light is not the cause of heat (moonlight carries no warmth). The type of material is not the cause (every kind of body generates heat through friction). Through successive exclusion, one arrives at a “First Vintage” (vindemiatio prima): the essence of heat is an expansive motion of minute particles (Book II, Aph. 20).

Alongside the three tables, Bacon enumerated twenty-seven types of “Prerogative Instances” (instantiae praerogativae) in Book II—observations of especially high informational value. The most consequential of these was the “Instance of the Fingerpost” (instantia crucis): a single experiment that decisively settles which of two rival hypotheses is correct. The phrase experimentum crucis—the “crucial experiment”—later used by Robert Hooke and Isaac Newton, traces directly to this passage.

Whether this procedure was the direct ancestor of modern experimental method is debated. That J. S. Mill’s Methods of Difference, Agreement, and Concomitant Variation grew out of it is beyond doubt. But Bacon himself neglected mathematics. The idea of describing laws of nature in mathematical equations, already present in his contemporary Galileo, was absent from Bacon’s toolkit.

3. The Great Instauration (Instauratio Magna): Rebuilding Knowledge Entirely

Published in 1620, the master plan. Its frontispiece is emblematic: a ship sailing past the Pillars of Hercules—the Strait of Gibraltar, supposed boundary of the ancient world—into the open ocean. Below, an inscription: “Many shall pass through and knowledge shall be increased” (Multi pertransibunt et augebitur scientia, from Daniel 12:4). A declaration: surpass the limits of antiquity.

Six parts. Part I: a classification of the sciences (largely accomplished in The Advancement of Learning). Part II: the Novum Organum. Part III: a compilation of natural and experimental histories. Part IV: concrete applications of the inductive method. Part V: provisional conclusions. Part VI: the completed new philosophy. Almost nothing was written beyond Part II. The vision outstripped one man’s lifetime.

Was the incompleteness a failure? Bacon himself did not think so. The plan was conceived from the start as a collaborative enterprise spanning generations, not the work of a single mind. The point was to make science independent of individual genius. Given method, institution, and funding, even a company of ordinary minds could advance knowledge. “My method levels intellects,” he wrote in the Distributio Operis (Plan of the Work). “Just as a ruler or compass allows anyone to draw a straight line or circle, regardless of the steadiness of the hand.”

4. “Knowledge Is Power”—The Unity of Knowledge and Practice

“Knowledge itself is power” (ipsa scientia potestas est). The line appears in the Meditationes Sacrae (1597), in the section “Of Heresies.” Its original context is theological—it concerns God’s knowledge. But Bacon himself applied the same structure to human knowledge in the Novum Organum, and the phrase broke loose as a secular motto. In later centuries it also circulated in the form scientia est potentia.

It was not a slogan. At the very opening of the Novum Organum, Bacon wrote: “Human knowledge and human power meet in one; for where the cause is not known the effect cannot be produced. Nature to be commanded must be obeyed” (Book I, Aph. 3). Knowledge and power are not separate things but two faces of the same act. Here was the decisive fork from Aristotle. For Aristotle, the highest knowledge was pure contemplation (theōria)—making nothing, changing nothing, simply seeing. For Bacon, knowledge meant operation: identifying causes in nature and reproducing effects. Knowing and making became one.

By binding knowledge to utility, Bacon made science the instrument of states and industries. He wanted this. For him, the expansion of knowledge was synonymous with the welfare of mankind. But “knowledge is power” can also turn knowledge into an instrument of domination. In the twentieth century, Adorno and Horkheimer named Bacon directly in Dialectic of Enlightenment (1947): enlightenment, they argued, passes through the domination of nature into the domination of human beings. There is exaggeration here. Yet the credit and the liability of having fused the will to know with the will to power remain attached to Bacon’s name.

5. New Atlantis and Solomon’s House: Designing the Institution of Science

Published posthumously in 1627, an unfinished utopian fiction. On the imaginary Pacific island of Bensalem stands a national research institute called Solomon’s House. Mineral experiments deep underground, meteorological observation from tall towers, plant breeding in gardens, pharmaceutical development, experiments with sound and light. Researchers are organized in a thoroughgoing division of labor. “Merchants of Light” gather knowledge abroad. “Depredators” extract knowledge from books. “Pioneers” attempt new experiments. “Compilers” organize results into tables. “Lamps” direct new lines of experiment. At the summit, “Interpreters of Nature” derive general laws from observations.

A blueprint in the guise of fiction. When the Royal Society was founded in London in 1660, its founders positioned themselves as heirs to Bacon’s vision. Wrenching science away from the solitary genius and conceiving it as a collective enterprise of organization, funding, and division of labor—that conceptual shift produced results that dwarfed the inductive method or the doctrine of the Idols themselves.

Guide to Major Works

• The Advancement of Learning (1605): One of the first major philosophical works written in English. A critique of the current state of learning and a comprehensive map of knowledge. The best entry point.
• Novum Organum (1620): The core of Bacon’s philosophy. The Four Idols and the inductive method. Written in aphoristic form, lending itself to selective reading.
• New Atlantis (1627, posthumous): Bacon’s vision of a scientific utopia. The description of Solomon’s House is the centrepiece. Short enough to read in a single sitting.
• Essays (1597 first edition; 1625 final edition): Fifty-eight essays on subjects from “Of Truth” and “Of Death” to “Of Revenge.” Read for four centuries as masterpieces of English prose.
• De Dignitate et Augmentis Scientiarum (1623): An expanded Latin version of The Advancement of Learning, serving as Part I of the Instauratio Magna. Its classification of knowledge directly influenced d’Alembert and Diderot’s Encyclopédie.

Major Criticisms and Controversies

Contemporary attacks struck first at his character. The man who betrayed the Earl of Essex. The Lord Chancellor who fell to bribery. The diagnostician of intellectual corruption was himself steeped in the corruption of power—a gap that proved irresistible to later critics. William Harvey, the discoverer of the circulation of the blood and Bacon’s personal physician, declared that “he writes philosophy like a Lord Chancellor” (reported in Aubrey’s Brief Lives)—a barb meaning he designed systems but rarely dirtied his own hands with experiment. The poet Alexander Pope was blunter still: “the wisest, brightest, meanest of mankind” (An Essay on Man, Epistle IV, 1734). The nineteenth-century historian Macaulay followed the same line, extolling the intellect while flaying the morals (“Lord Bacon,” Edinburgh Review, 1837).

The criticism of method goes deeper. David Hume raised the problem of induction: from the fact that the sun has risen in the past, the conclusion that it will rise tomorrow does not logically follow. Induction, Hume declared, is habit, not proof. Karl Popper pressed further: science does not “confirm” laws by induction but advances by framing bold hypotheses and attempting to falsify them (The Logic of Scientific Discovery, 1934). For Popper, Bacon was the founding father of an erroneous myth called inductivism.

That verdict deserves qualification. Bacon himself rejected simple enumerative induction. His method includes exclusion and comparison, and differs structurally from the naïve enumeration Popper attacked—the kind that says “however many white swans you count, you cannot conclude there are no black ones.” Nonetheless, Bacon’s neglect of mathematics and undervaluation of the role of hypotheses are real shortcomings. Given that his contemporaries Galileo and Kepler were already using mathematics to describe natural laws, Bacon’s methodology stood at some distance from the cutting edge of scientific practice.

Influence and Legacy

The most tangible legacy is the Royal Society, founded in London in 1660. Its early Fellows looked to Bacon as their spiritual ancestor. Thomas Sprat, in his History of the Royal Society (1667), explicitly hailed Bacon as the founder of experimental philosophy. In practice, the Society’s activities followed the blueprint of Solomon’s House with considerable fidelity.

The impact on the French Enlightenment was immense. D’Alembert built the classification of knowledge in the Encyclopédie (Preliminary Discourse, 1751) on Bacon’s framework: Memory (History), Reason (Philosophy), Imagination (the Arts)—a tripartite scheme originating in Bacon’s Advancement of Learning. Voltaire called Bacon “the father of experimental philosophy” (Letters on the English, Letter XII, 1734).

Within the lineage of British empiricism, Bacon stands behind the Locke–Berkeley–Hume succession. His influence was less a direct transmission of ideas than the laying of intellectual ground: start from experience. In the nineteenth century, J. S. Mill refined Bacon’s Three Tables into the precise formulations of his inductive methods (A System of Logic, 1843). Across the Atlantic, Thomas Jefferson ranked Bacon alongside Newton and Locke as “the three greatest men the world had ever produced” (letter to Benjamin Rush, 1811) and hung portraits of all three in his home at Monticello.

In the twentieth century, Bacon was re-read from two directions. From sociology of science: as a precursor of the recognition that science is a social institution. From critical theory: as Adorno and Horkheimer argued, the logic of “knowledge is power” can be turned from the domination of nature to the domination of human beings. Bacon stands at the starting point of both the achievements and the crimes of modern science.

Connections to the Present

How many people read the fine print “individual results may vary” at the bottom of a health-supplement advertisement? “I took it and felt better”—the testimonial sticks in memory, while the silent majority who noticed no change leave no trace. The Idol of the Tribe. Child-rearing works the same way: measuring today’s children against the education one happened to receive and lamenting “kids these days” is the Idol of the Cave in domestic form. Bacon delivered the diagnosis but wrote almost nothing about the cure. The diagnosis was complete in the seventeenth century. The cure is still outstanding.

The replication crisis in science shares the same root. In psychology and medicine, an alarming number of published findings fail to replicate. Publication bias, p-hacking, underpowered samples. Picking data that fit the theory and discarding data that do not—the Idol of the Theatre itself, restaged inside peer-reviewed journals.

“Knowledge is power” is also being re-examined. A pharmaceutical company knows the cause of a disease, produces the drug, and profits through patents. A pesticide manufacturer knows the ecology of a pest, engineers the poison, and leaves side effects in the soil and the water. Bacon’s formula—“know the cause and reproduce the effect”—carried from the start an unasked question: who holds the knowledge, and who bears the consequences? When knowledge becomes power, in whose hands does that power rest?

Questions for the Reader

• Among the things you believe, which are merely reinforced by confirmation bias—the Idol of the Tribe? When was the last time you read a contrary opinion with genuine seriousness?
• Has your area of expertise or special skill become your own “cave”? Are you trying to judge problems outside your field using only the tools inside it?
• If you take “knowledge is power” as your motto, at whom does that power aim? At nature—or at other people?

References

• (Primary text): Francis Bacon, The Works of Francis Bacon, ed. James Spedding, Robert Leslie Ellis and Douglas Denon Heath, 14 vols., Longmans, 1857–1874. (Standard edition.)
• (Primary text, modern edition): Francis Bacon, The New Organon, ed. Lisa Jardine and Michael Silverthorne, Cambridge University Press, 2000.
• (Biography): Perez Zagorin, Francis Bacon, Princeton University Press, 1998.
• (Biography): Lisa Jardine and Alan Stewart, Hostage to Fortune: The Troubled Life of Francis Bacon, Victor Gollancz, 1998.
• (Study): Stephen Gaukroger, Francis Bacon and the Transformation of Early-Modern Philosophy, Cambridge University Press, 2001.
• (Reference): “Francis Bacon,” Stanford Encyclopedia of Philosophy.