Thales
c. 624 BCE–c. 546 BCE · Miletus
Thales of Miletus was a Greek philosopher, mathematician, and astronomer of the early 6th century BCE, traditionally counted as the first of the Greek philosophers and one of the legendary Seven Sages. He is credited with proposing that water is the basic principle of all things and, by tradition, with predicting a solar eclipse and founding the study of geometry among the Greeks. Because no writings survive, many of the achievements attached to his name come from later, sometimes legendary, reports.
“Thales held that water is the first principle (archē) of all things.”
Did you know?
A philosopher predicted the eclipse that stopped a war
Herodotus reports that Thales of Miletus foretold a solar eclipse. When the sky darkened during a battle between the Lydians and the Medes on 28 May 585 BCE, both armies read it as an omen and made peace on the spot.
How we know
Herodotus, Histories 1.74; the “eclipse of Thales” / Battle of the Halys is dated to the solar eclipse of 28 May 585 BCE. Thales c. 624–546 BCE.
The “first scientist” measured a pyramid that was already nearly 2,000 years old
Thales of Miletus (c. 624–546 BCE), often called the first scientist, is said by later ancient writers to have measured the Great Pyramid's height from the length of its shadow. Even by his day the monument was already roughly 1,975 years old (built c. 2560 BCE) — a nearly two-millennia-old relic pressed into service for one of the earliest recorded feats of applied geometry.
How we know
Thales c. 624–546 BCE; shadow measurement placed c. 585 BCE; Great Pyramid built c. 2560 BCE. Gap: 2,560 − 585 = 1,975 yrs. The shadow anecdote is attributed by Diogenes Laërtius (via Hieronymus of Rhodes), Pliny (Natural History 36) and Plutarch — hence “is said.”
“The ancient Greeks” spanned more time than separates us from the printing press
From Thales, the first Greek philosopher, to Plotinus at the tradition's late height, classical Greek philosophy ran for roughly nine centuries — a longer stretch of time than separates us today from Gutenberg's invention of the printing press.
Meet Plotinus →How we know
Thales b. c. 624 BCE; Plotinus d. c. 270 CE → span ≈ 893 yrs (~9 centuries). Gutenberg's press c. 1440 CE → 2026 − 1440 = 586 yrs. 893 > 586.
Life journeyclick any stop, or use ←/→
MiletusIonia (Asia Minor)
We know they were here, but the specifics of what they did at this stop aren’t recorded yet in our corpus.
About Miletus
The prosperous Ionian port where Greek philosophy was born, as Thales, Anaximander, and Anaximenes first sought to explain the cosmos through nature rather than myth.
In Miletus at the same time
In the same place & time
Sages whose lives overlapped with Thales’s in the same cities, drawn from their recorded journeys.
In the same tradition
The world in their lifetime
Thinkers and teachers of other traditions whose lives overlapped with Thales’s — a glimpse of the wider world they lived in. Drawn purely from recorded birth and death years.
Jewish world
Egyptian world
Mesopotamian world
Works
No works attributed in the corpus yet.