From Hecataeus to Strabo: Pelasgians and migrations

My research tries to identify lines of tradition concerning the most enigmatic Pre-Greek people: the Pelasgians. The starting point is a famous excerptum by Hecataeus in Strabo in which he states that the Peloponnesus, before being occupied by the Greeks, was inhabited by barbarians (FGrHist 1 F 119 = STRAB., VII 7, 1). Herodotus, when speaking of the Pelasgians, focuses mainly on the linguistic datum and the relations between Athenians and Pelasgians, while Thucydides in his Archaeology is mainly interested in the socio-economic dynamics of migration. Hellanicus of Lesbos is the first author to consider the name Pelasgians as the ancient name of the Tyrrhenians/Etruscans. STRAB., V 2, 4 is a kind of short treatise on the Pelasgians and their relations with Italy and reports Ephorus' opinion on the Arcadian origin of the Pelasgians. The Latin sources confirm the picture I have tried to outline: on the one hand in epic poetry the name Pelasgi indicates the Greeks of the earliest times, on the other a people of ancient inhabitants of central Italy. From the research on the Pelasgians in Greek and Latin sources, several lines of tradition emerge: those present in the historians and geographers of the 6th-5th centuries (Hecataeus, Herodotus), who were interested in the earliest history of Greece (Hecataeus) also in relation to the political order contemporary to them (Herodotus); the socio-economic line of Thucydides; the antiquarian tradition, which developed from the exegesis of epic poetry and became prevalent during the Hellenistic age and later in Rome. In this last line of tradition, the studies of grammarians are intertwined with historical and geographical literature, from Ephorus to Strabo.