τὸ ἄπειρον (to apeiron) is a Greek word meaning “(that which is) unlimited”, “boundless”, “infinite”, or “indefinite”. τὸ ἄπειρον 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 (arche) is eternal and infinite, or boundless, subject to neither old age nor decay, which perpetually yields fresh materials from which everything we can perceive is derived. Apeiron generated the opposites (hot–cold, wet–dry, e…
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