Why Study the History of Science? Natural Philosophy vs. "Science"

History of Science: Antiquity to the Scientific Revolution

Chapter 1 · Why Study the History of Science? Natural Philosophy vs. "Science"

This course traces the real scientific content and institutional history of science — not just its physics, but its universities, learned societies, and the slow professionalization of the whole enterprise — from the ancient world through the close of the Scientific Revolution, around 1700. Before any of that, it's worth pausing on a genuinely surprising real fact: the very word "scientist" is younger than the steam locomotive.

A Word Younger Than You'd Expect

Every person this course covers — Newton included — lived and worked before the word "scientist" existed at all. It was coined in 1833 by the English philosopher and historian of science William Whewell, and first appeared in print the following year, 1834, in Whewell's own anonymous review of Mary Somerville's On the Connexion of the Physical Sciences, published in the Quarterly Review.

Whewell's real, stated reasoning was practical: by the early 19th century, science was already splitting into real specialisms — "chemist," "naturalist," and similar terms were already common — leaving no single word for someone who studied science broadly. His own real, quoted proposal:

"As we cannot use physician for a cultivator of physics, I have called him a Physicist. We need very much a name to describe a cultivator of science in general. I should incline to call him a Scientist."

Before Whewell's coinage, the people this course will spend ten chapters on — Eratosthenes, Ibn al-Haytham, Copernicus, Newton — were real, working natural philosophers, a term dating back at least to Aristotle. Isaac Newton's own 1687 masterwork isn't titled anything resembling "the principles of science" — its real title is Philosophiæ Naturalis Principia Mathematica, "The Mathematical Principles of Natural Philosophy."

A Genuine Surprise "Scientist" wasn't even widely adopted once Whewell coined it. The real historical record shows it caught on in the United States earlier in the 19th century, but wasn't in common use in Britain itself until around the turn of the 20th century — meaning even many working scientists of the mid-to-late 1800s would still have called themselves natural philosophers or "men of science" instead.

What "Natural Philosophy" Actually Meant

Natural philosophy wasn't a vague or informal label — it was the real, systematic, research-based study of the natural world, deliberately set apart from the supernatural, covering what modern readers would separately call physics, astronomy, chemistry, and biology all at once. It was philosophy in the older, broader sense: a genuine, disciplined pursuit of knowledge about how the world works, not merely armchair speculation.

Aristotle (4th century BCE)

The term's real roots trace to Aristotle's own works on nature — physics, biology, and cosmology treated as one unified philosophical pursuit.

Newton (1687)

Titled his own defining work Philosophiæ Naturalis Principia Mathematica — "natural philosophy," not "physics" or "science," was still the real operative term.

Kelvin & Tait (1867)

Their real Treatise on Natural Philosophy helped define much of modern physics — the old term was still current a full generation after Whewell's 1834 proposal.

Where the Line Actually Fell

Era	Real Operative Term	What It Covered
Antiquity through the 18th century	Natural philosopher	Physics, astronomy, biology, and chemistry, studied together as one philosophical pursuit
Early-to-mid 19th century	Man of science / cultivator of science	The same broad pursuit, now genuinely fragmenting into named specialisms (chemist, naturalist)
1833/1834 onward	Scientist (Whewell's own coinage)	A single word for a specialist in any one branch of the newly professionalizing sciences

The word's own real history is a genuine clue to this course's own larger theme: "science" as a distinct, professionalized activity — with its own institutions, journals, and career path — is a comparatively recent invention. What this course actually studies is the millennia-long process that led up to that split, not a modern activity that always existed under a different name.

What This Course Actually Covers

This course is deliberately bounded to close around 1700 — Newton's Principia (1687) and the Royal Society's own institutional maturity — precisely to avoid repeating the Science Subject's own already-deep, real coverage of 18th-through-20th-century physics in Classical Mechanics & Thermodynamics, Electromagnetism & Relativity, and Quantum Physics Fundamentals. This course's own real focus is the scientific content and institutional history those courses don't cover: ancient Mesopotamian and Egyptian mathematics and medicine, Greek natural philosophy, the Islamic Golden Age's own real scientific contributions, the medieval European university system, and the Copernican and Scientific Revolutions that gave the whole enterprise its modern shape.

Cross-References, Not Repetition Where this course's own subject matter genuinely overlaps with material already covered elsewhere on the site, later chapters point directly to it rather than repeating it: Chapter 3 cross-references Philosophy I's own pre-Socratic material for the metaphysics behind Greek natural philosophy, Chapter 7 cross-references Classical Mechanics & Thermodynamics' own already-corrected Galileo tower myth, and Chapter 9 cross-references Scientific Methodology's own modern demarcation material rather than re-deriving what counts as "scientific" a second time.

Looking Ahead

Chapter 2 goes back before natural philosophy had a Greek name at all — to the real astronomy, medicine, and mathematics practiced in ancient Mesopotamia and Egypt, the genuine foundations Greek natural philosophy itself was built on top of.

Reflect

Question 1 Newton himself never called himself a "scientist" — the word didn't exist yet. What does it change about how you think of Newton's own work to know he thought of himself as a natural philosopher instead?

Question 2 Whewell coined "scientist" specifically because science was already splitting into specialisms like "chemist" and "naturalist." What does that timing suggest about the real relationship between specialization and the need for a new, general word?

Question 3 This course closes around 1700 rather than continuing into the 18th-20th centuries, which the Science Subject's own other courses already cover in depth. What real advantages come from studying a bounded historical period rather than one continuous sweep to the present day?

Chapter 1 Quick Reference

"Scientist" — coined by William Whewell in 1833, first published in 1834, in a review of Mary Somerville's own work
Prior term: "natural philosopher" — the real, operative term from Aristotle through at least the mid-19th century
Newton's own 1687 title: Philosophiæ Naturalis Principia Mathematica — "natural philosophy," not "science"
Adoption: "scientist" gained real traction in the US earlier in the 19th century; not common in Britain until around 1900
Course scope: antiquity through c. 1700 — deliberately bounded to avoid repeating the Science Subject's own later physics history