Bacon's Novum Organum Argues for Knowledge Built From Observation
A former Lord Chancellor tries to replace Aristotle's logic with a method built on collected facts
Quick facts
- Philosopher
- Francis Bacon, 1561 to 1626
- Work
- Novum Organum, 1620
- Method
- Eliminative induction from collected observations
What happened
Francis Bacon, an English lawyer and former Lord Chancellor, published the Novum Organum in 1620 as the second part of a planned larger project called the Instauratio Magna, the Great Instauration. The title deliberately echoed and answered Aristotle's Organon, the body of logical works that had structured university teaching on reasoning for nearly two thousand years. Where Aristotle's logic proceeded from general premises to particular conclusions through syllogism, Bacon argued for what he called eliminative induction: gathering large, organized collections of specific observations, called natural histories, and working upward from them toward general conclusions, systematically ruling out false explanations as the evidence accumulated. Bacon also catalogued the mental habits, which he called the idols of the mind, that he believed distorted human judgment and had to be guarded against before reliable knowledge was possible.
Why it matters
Bacon's method gave the emerging scientific community a shared justification for valuing controlled observation and collected data over inherited textual authority, a principle the Royal Society would later adopt explicitly as its founding creed. Bacon himself ran few experiments. His case that nature had to be interrogated systematically through organized observation still shaped how the next generation of English experimenters described what they were doing.
How we know
The Novum Organum survives in its original Latin and in translation, and the Stanford Encyclopedia of Philosophy's entry on Francis Bacon traces its structure and argument, including the doctrine of the idols and Bacon's stated aim of replacing Aristotle's Organon, from the printed text and Bacon's other writings including his 1609 letters describing the project in progress.
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)
- 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)
See something wrong? . Corrections with a source get fixed fastest.
Part of a timelineThe Scientific Revolution20 events · How observation and mathematics replaced ancient authority between 1543 and 1727View all →