Francis Bacon and the Foundations of Modern Science

Introduction to Francis Bacon and the Scientific Revolution

  • Biographical Context: Francis Bacon (1561–1626) is regarded as the "prophet" of the seventeenth-century scientific revolution. This period marked a transformation in the foundations of thought and signaled the beginning of the Age of Science.
  • Critique of Contemporary Thought: Similar to Old Testament prophets, Bacon identified intellectual "evils" in his era. He criticized the science of his day using biblical metaphors, arguing that leading thinkers (the medieval schoolmen) had wandered from the truth to worship "idols."
  • Renaissance Influence: Bacon lived during the height of the English Renaissance, which occurred approximately one hundred years after the Italian Renaissance. He shared several common Renaissance attitudes:
    • Rejection of the Medieval Worldview: He viewed medieval scholasticism as a "pernicious error."
    • Intellectual Optimism: He believed it was possible to encompass the entirety of human knowledge within his sphere of activity.
    • Temporal Awareness: He held a strong faith that he stood on the threshold of a entirely new intellectual era.
  • Reinterpretation of Power: Bacon famously asserted that "knowledge is power." While he shared this central concept with Machiavelli, their applications differed:
    • Machiavelli: Focused on the power a prince wields over his subjects.
    • Bacon: Focused on the power all humans could wield over nature through scientific understanding.
  • The Instauratio Magna (Great Renewal): Bacon’s major work aimed at a "total reconstruction of the sciences, arts, and all human knowledge."
  • Novum Organum (The New Organon, 1620): Part of the Instauratio Magna, this work contains aphorisms regarding the interpretation of nature and the "Kingdom of Man."

The Nature of Man and Knowledge

  • The Role of Man: Bacon defines man as the "servant and interpreter of Nature." Human understanding and action are strictly limited to what has been observed in the "course of nature" through fact or thought. Beyond these observations, man knows nothing and can do nothing.
  • Requirement for Instruments: Bacon argues that the "naked hand" and the "understanding left to itself" are insufficient for great works. Just as physical tasks require tools to provide or guide motion, the intellect requires "instruments" or "helps" to provide suggestions or cautions.
  • Unity of Knowledge and Power: "Human knowledge and human power meet in one." If the cause of a phenomenon is unknown, the effect cannot be produced. To command nature, one must first obey her; the knowledge gained in "contemplation" as a cause becomes a "rule" in practical operation.
  • The Scope of Human Action: Towards achieving works, man's only capability is to "put together or put asunder natural bodies." The remainder of the work is performed by nature working from within.
  • The Necessity of New Methods: Bacon asserts it is "unsound fancy" to expect that accomplishments never before achieved can be realized using old methods. Progress requires methods that have "never yet been tried."

Critique of Existing Logic and Science

  • The Failure of Current Science: Bacon contends that existing sciences do not assist in finding new works, and currently used logic does not help in discovering new sciences.
  • Stability of Error: The logic currently in use serves to stabilize and fix errors found in "commonly received notions" rather than aiding the search for truth. Consequently, it does "more harm than good."
  • Superficiality of Discovery: Current scientific discoveries stay close to "vulgar notions" and barely scratch the surface of nature. To reach the "inner and further recesses of nature," both notions and axioms must be derived from things in a "more sure and guarded way."

The Two Ways of Searching for Truth

Bacon identifies only two paths for the discovery of truth:

  • The Fashionable Way (Deduction/Traditional Logic):
    • This method flies from the senses and particulars directly to the "most general axioms."
    • It treats these general principles as settled and immovable.
    • From these, it proceeds to judgment and the discovery of "middle axioms."
    • Bacon characterizes this as establishing "abstract and useless generalities."
  • The True Way (Induction):
    • This method derives axioms from the senses and particulars.
    • It rises by a "gradual and unbroken ascent" through various levels of axioms.
    • The "most general axioms" are arrived at last of all.
    • Bacon notes this way is "as yet untried."
  • Key Distinctions: While both methods start from senses and particulars, the first way only glances at experiment and particulars in passing, whereas the second "dwells duly and orderly among them."

The Doctrine of the Idols

Bacon identifies four classes of "Idols"—false notions and fallacies that beset the human mind and obstruct the entrance of truth.

  • Idols of the Tribe (Idola Tribus):
    • Foundation: These are rooted in human nature and the very race of men.
    • Core Fallacy: The false belief that "man is the measure of things." All perceptions of the senses and mind are according to the measure of the individual human, not the universe.
    • Analogy: The human understanding is like a "false mirror" that distorts the nature of things by mingling its own nature with the rays it receives irregularly.
  • Idols of the Cave (Idola Specus):
    • Foundation: These are specific to the individual man.
    • Causes: An individual’s "cave" or den is shaped by their unique nature, education, conversations, reading (authority figures), and their specific state of mind (preoccupied vs. indifferent).
    • Constraint: As Heraclitus observed, men look for sciences in their own "lesser worlds" rather than the "greater or common world."
  • Idols of the Marketplace (Idola Fori):
    • Foundation: These arise from the association and commerce of men through discourse.
    • The Problem of Language: Words are often "imposed according to the apprehension of the vulgar." Improper and unfit choices of words obstruct understanding.
    • Resistance to Definition: Even the definitions and explanations of learned men cannot correct the confusion, as words "force and overrule the understanding," leading to empty controversies and "idle fancies."
  • Idols of the Theatre (Idola Theatri):
    • Foundation: These have "immigrated into men's minds" from various philosophical dogmas and wrong laws of demonstration.
    • Analogy: Bacon calls them "stage-plays" because received systems represent worlds of their own creation in an "unreal and scenic fashion."
    • Scope: This includes not only current systems and ancient sects but also principles and axioms that have been accepted through tradition, credulity, and negligence.

The Method of Delivery and Proper Remedy

  • True Induction: The formation of ideas and axioms via "true induction" is the remedy for clearing away idols. Pointing out the idols is as useful to the "Interpretation of Nature" as the refutation of sophisms is to common logic.
  • The Borgia Analogy: Bacon references a quote by Borgia regarding the French expedition into Italy: the French came with "chalk in their hands to mark out their lodgings" rather than arms to force their way. Bacon wishes his doctrine to enter "quietly" into minds capable of receiving it.
  • Process of Familiarization: The only method left is to lead men to "particulars themselves, and their series and order." Men must force themselves to set aside their preconceived notions for a time and familiarize themselves with facts.
  • Contrast with Skepticism: Bacon distinguishes his method from those who deny the possibility of certainty. While skeptics assert nothing can be known, Bacon asserts that "not much can be known in nature by the way which is now in use." He seeks to supply "helps" for the senses and understanding rather than destroying their authority.

Critical Evaluation of Bacon's Method

  • Scientific Limitations: Although a prophet of the new science, Bacon did not fully understand the method eventually employed by figures like Galileo and Newton.
  • Methodological Gaps: His concept of induction was incomplete because it failed to account for:
    1. The formulation of hypotheses.
    2. The deduction and verification of their consequences.

Questions & Discussion

  • How does Bacon propose to find truth?: Bacon proposes finding truth through the method of induction. This involves starting with careful, continued observation of specific natural occurrences (particulars) and rising through a "gradual and unbroken ascent" to the most general axioms last. He emphasizes that one must move away from scholastic philosophy and the use of current logic that only stabilizes errors.
  • What are the strengths and weaknesses of his inductive method?:
    • Strengths: It grounds knowledge in empirical observation rather than abstract theory; it identifies and attempts to neutralize cognitive biases (the Idols); it establishes a disciplined path from specific data to general laws; it emphasizes the utility of science for the benefit of mankind ("knowledge is power").
    • Weaknesses: It lacks the use of mathematical deduction and hypothesis testing found in modern science; it assumes that data collection alone eventually leads to truth without the intermediate step of theoretical modeling; it does not fully integrate the verification of consequences as seen in the work of Galileo or Newton.