School of thought

Milesians

School

Explore in the interactive map

Classification

Period
c. 624-528 BCE
Regions
europe
Domains
Metaphysics , Philosophy of Nature

Overview

The Milesians were early Greek inquirers associated with Miletus whose surviving testimony concerns the causes and principles of nature. Later sources associate Thales with water, Anaximander with the indefinite or boundless (apeiron), and Anaximenes with air and processes of rarefaction and condensation. Because their evidence is fragmentary and largely transmitted by later authors, both the details of their views and the unity of a master-to-pupil school require caution.

Key ideas

  • Inquiry into Nature: The Milesians sought explanations in the world's own principles and processes while investigating celestial and terrestrial phenomena. This was not a simple one-step replacement of myth by reason, and their philosophical and scientific concerns were not separate disciplines.
  • Originating Principles: Aristotle's later reconstruction presents water, the *apeiron*, and air as originating principles. Whether the Milesians also treated each as one material substance persisting through every change is disputed.
  • Anaximander's Apeiron: Testimony describes the *apeiron* as an indefinite or boundless originating nature from which worlds and opposed qualities arise. Its exact character remains a matter of interpretation, and the fragmentary evidence cannot support claims of conceptual priority.

Key figures

Thales · Anaximander · Anaximenes

Later connections

References