Bacon Argues for Induction in the Novum Organum
Knowledge should be built up from observation, not handed down from Aristotle's syllogisms
Quick facts
- Bacon's dates
- 1561-1626
- Novum Organum published
- October 1620
- Part of
- The Instauratio Magna (Part II)
- Four idols
- Tribe, Cave, Marketplace, Theatre
What happened
Francis Bacon, born in 1561, published the Novum Organum in October 1620 as the second part of his larger Instauratio Magna, a planned six-part program for reforming human knowledge. Against what he considered the sterile deductive logic and reliance on syllogisms inherited from Aristotle and the medieval schoolmen, Bacon argued for building knowledge inductively, moving step by step from particular observations toward general axioms rather than starting from the most general principles and reasoning downward. He diagnosed four systematic sources of error that distort human reasoning, which he called idols of the mind: the Idols of the Tribe, the Cave, the Marketplace, and the Theatre, covering biases built into human nature, individual temperament, language, and inherited philosophical systems respectively.
Why it matters
Bacon's case for induction and controlled observation, and his diagnosis of the biases that corrupt untrained reasoning, helped set the methodological terms for the Scientific Revolution that unfolded across the following decades, giving experimental science a philosophical rationale independent of scholastic Aristotelianism.
How we know
The Novum Organum survives complete in its original 1620 Latin printing and has been continuously translated, studied, and reprinted since; Bacon's biography and the work's composition and publication history are corroborated by his extensive surviving correspondence and other writings from the period.
Sources
- Stanford Encyclopedia of Philosophy. Francis Bacon · Reputable sourceplato.stanford.edu · The domain "plato.stanford.edu" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
- Internet Encyclopedia of Philosophy. Francis Bacon · Reputable sourceiep.utm.edu · The domain "iep.utm.edu" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
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Related timelines
- The Scientific Revolution → · See the Scientific Revolution timeline for how Bacon's inductive method fed directly into the experimental science of the following decades.