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  2. Anaximander - Wikipedia

    en.wikipedia.org/wiki/Anaximander

    He proposed the theory of the apeiron in direct response to the earlier theory of his teacher, Thales, who had claimed that the primary substance was water. The notion of temporal infinity was familiar to the Greek mind from remote antiquity in the religious concept of immortality, and Anaximander's description was in terms appropriate to this ...

  3. Unity of opposites - Wikipedia

    en.wikipedia.org/wiki/Unity_of_opposites

    Anaximander posited that every element had an opposite, or was connected to an opposite (water is cold, fire is hot). Thus, the material world was said to be composed of an infinite, boundless apeiron from which arose the elements (earth, air, fire, water) and pairs of opposites (hot/cold, wet/dry). There was, according to Anaximander, a ...

  4. Spontaneous generation - Wikipedia

    en.wikipedia.org/wiki/Spontaneous_generation

    Anaximander of Miletus considered that from warmed up water and earth emerged either fish or entirely fishlike animals. Inside these animals, men took form and embryos were held prisoners until puberty; only then, after these animals burst open, could men and women come out, now able to feed themselves.

  5. Anaximenes of Miletus - Wikipedia

    en.wikipedia.org/wiki/Anaximenes_of_Miletus

    Anaximenes's apparent instructor, Anaximander, was a Milesian philosopher who proposed that apeiron, an undefined and boundless infinity, is the origin of all things. [1] Anaximenes and Anaximander were two of the three Milesian philosophers, along with Thales. These were all philosophers from Miletus who were the first of the Ionian School. [7]

  6. Apeiron - Wikipedia

    en.wikipedia.org/wiki/Apeiron

    The apeiron is central to the cosmological theory created by Anaximander, a 6th-century BC pre-Socratic Greek philosopher whose work is mostly lost. From the few existing fragments, we learn that he believed the beginning or ultimate reality is eternal and infinite, or boundless (apeiron), subject to neither old age nor decay, which perpetually yields fresh materials from which everything we ...

  7. First principle - Wikipedia

    en.wikipedia.org/wiki/First_principle

    Anaximenes, Anaximander's pupil, advanced yet another theory. He returns to the elemental theory, but this time posits air, rather than water, as the arche and ascribes to it divine attributes. He was the first recorded philosopher who provided a theory of change and supported it with observation.

  8. Ionian school (philosophy) - Wikipedia

    en.wikipedia.org/wiki/Ionian_School_(philosophy)

    Anaximander (Greek: Ἀναξίμανδρος, Anaximandros) (c. 610 – c. 546 BCE) wrote a cosmological work, little of which remains.From the few extant fragments, we learn that he believed the beginning or first principle (arche, a word first found in Anaximander's writings, and which he probably invented) is an endless, unlimited mass (), subject to neither old age nor decay, which ...

  9. Philosophy of matter - Wikipedia

    en.wikipedia.org/wiki/Philosophy_of_matter

    Thales's theory was refuted by his pupil and successor, Anaximander. Anaximander noted that water could not be the arche because it could not give rise to its opposite, fire. Anaximander claimed that none of the elements (earth, fire, air, water) could be arche for the same reason. Instead, he proposed the existence of the apeiron, an ...