Which Greek Stoic philosopher mentioned two of the four subgroups of the Helvetians that failed in their migration attempt to Gaul?
Helvetii The Helvetii (Latin: "Helvētiī" ] ) were a Gallic tribe or tribal confederation occupying most of the Swiss plateau at the time of their contact with the Roman Republic in the 1st century BC. According to Julius Caesar, the Helvetians were divided into four subgroups or "pagi." Of these Caesar only names the Verbigeni and the Tigurini, while Posidonius mentions the Tigurini and the Tougeni (Τωυγενοί ). They feature prominently in the "Commentaries on the Gallic War," with their failed migration attempt to southwestern Gaul (58 BC) serving as a catalyst for Caesar's conquest of Gaul.
Critias (dialogue) Critias ( ; Greek: Κριτίας ), one of Plato's late dialogues, recounts the story of the mighty island kingdom Atlantis and its attempt to conquer Athens, which failed due to the ordered society of the Athenians. "Critias" is the second of a projected trilogy of dialogues, preceded by "Timaeus" and followed by "Hermocrates". The latter was possibly never written and "Critias" was left incomplete. Because of their resemblance (e.g. in terms of persons appearing), modern classicists occasionally combine both "Timaeus" and "Critias" as "Timaeus-Critias".