I find it interesting that in all of the Histories of Herodotus, there is no overt mention of Jews or Judaism. Herodotus describes the Persian conquest of Babylon (539 BC), an event of great significance in Jewish history, but there is no notice that the Jews were ever in captivity there, or that Cyrus allowed them to return to Jerusalem. In all of Herodotus’s anthropological investigation of the various peoples of the world in the fifth century BC, there is no notice of the Jews at all (unless they are the “Palestinian Syrians” who supplied some ships for Xerxes’s invasion of Greece in 7:89). Come to think of it, there is no mention of the Jews in Arrian’s Anabasis of Alexander (second century AD), even though Alexander (d. 323 BC) had besieged the Phoenician city of Tyre, and then headed down to Egypt to found Alexandria (and to receive word that he was divine at the oasis of Siwa).
This is strange considering how influential the Jews were later to become. Judaea was the trouble spot for the Romans. I suppose that the Jews had largely settled around Jerusalem (elevation: 750 m), while the road to Egypt passed along the coast – i.e. it was easy for people ignore the Jews in the 5th and 4th centuries BC.