zoom_in Click to enlarge

Anaximenes

▲ ▼

description Anaximenes Overview

Anaximenes was a pre-Socratic philosopher from the ancient Greek city of Miletus who was active during the 6th century BCE. As a prominent member of the Milesian School, he argued that aer, or air, was the fundamental underlying substance of all matter. He theorized that air could transform into other elements through the processes of rarefaction and condensation, such as turning into wind, clouds, water, and eventually stone. His naturalistic framework provided an early physical explanation for the natural world.

help Anaximenes FAQ

What did Anaximenes believe was the basic substance of the universe?

Anaximenes argued that aer, or air, was the fundamental substance underlying all matter. He was active in the 6th century BCE as part of the Milesian School in Miletus.

How did Anaximenes explain the formation of different materials?

He proposed that air becomes different substances through condensation and rarefaction. As air becomes denser it produces materials such as water and earth, while rarefaction produces lighter forms such as fire.

How did Anaximenes differ from Thales?

Thales identified water as the fundamental principle, whereas Anaximenes chose air. Both were Milesian philosophers who sought natural explanations instead of relying only on traditional mythology.

Who influenced Anaximenes?

Anaximenes followed Anaximander in the Milesian tradition and developed a more concrete cosmic substance than Anaximander's apeiron, or boundless principle. His ideas belong to the early Greek natural-philosophical tradition before Socrates.