But in the figures of Anaxagoras, Democritus, and Protagoras, who visited or migrated to Athens, we can see the link with the older Ionian tradition being maintained. Anaxagoras of Clazomenae, an Asiatic city of the Ionian League, was regarded as having introduced philosophy to Athens after the Persian Wars. Like the Milesians before him, Anaxagoras maintained that the world consisted of a material substance, consisting in his case of infinite and indestructible primary elements, which could not multiply or vanish but only mingle and separate. Anaxagoras’s material universe was, however,
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