Book 1
prol.15
There is another which ends with Chrysippus, that is to say by passing from Socrates to Antisthenes, then to Diogenes the Cynic, Crates of Thebes, Zeno of Citium, Cleanthes, Chrysippus. And yet again another ends with Theophrastus; thus from Plato it passes to Aristotle, and from Aristotle to Theophrastus. In this manner the school of Ionia comes to an end.
prol.15
In the Italian school the order of succession is as follows: first Pherecydes, next Pythagoras, next his son Telauges, then Xenophanes, Parmenides,This succession (Pythagoras, Telauges, Xenophanes, Parmenides) does not exactly agree with what is said in the lives of Xenophanes and Parmenides, ix. 18, 21, where Parmenides, not Xenophanes, is made a pupil of the Pythagoreans. The arrangement followed in i. 12-15 treats the Italian school as a true succession, whereas in Book IX. many of them are regarded as sporadic thinkers, according to the view expressed in viii. 91. Zeno of Elea, Leucippus, Democritus, who had many pupils, in particular Nausiphanes [and Naucydes], who were teachers of Epicurus.
prol.16
Philosophers may be divided into dogmatists and sceptics: all those who make assertions about things assuming that they can be known are dogmatists; while all who suspend their judgement on the ground that things are unknowable are sceptics. Again, some philosophers left writings behind them, while others wrote nothing at all, as was the case according to some authorities with Socrates, Stilpo, Philippus, Menedemus, Pyrrho, Theodorus, Carneades, Bryson; some add Pythagoras and Aristo of Chios, except that they wrote a few letters. Others wrote no more than one treatise each, as Melissus, Parmenides, Anaxagoras. Many works were written by Zeno, more by Xenophanes, more by Democritus, more by Aristotle, more by Epicurus, and still more by Chrysippus.
