The Dorian invasion (or Dorian migration)[1] is an ancient Greek myth and discredited archaeological hypothesis describing the movement of the Dorian people into the Peloponnese region of Greece. According to the myth, the Dorians migrated from central Greece shortly after the Trojan War and populated most of the southern Peloponnese, particularly the regions of Laconia, Messenia and the Argolid. The myth became combined with that of the Return of the Heracleidae, such that the descendants of the hero Heracles were imagined to have led the Dorians and who founded the ruling lines of several Dorian cities, including Sparta. The myth probably emerged during the Early Iron Age as part of a process of ethnogenesis between cities claiming Dorian ancestry. In the fifth century BCE, it gained greater prominence through its use to promote unity among Sparta's Peloponnesian allies, and to differentiate Sparta from its rival Athens, believed to be of Ionian heritage.
In 1824, the German antiquarian Karl Otfried Müller published The Dorians, in which he argued that the Dorians were a northern, Indo-European people who invaded Greece and subjugated the Peloponnese. Müller's views gained general scholarly acceptance throughout the remainder of the nineteenth century and into the twentieth. The Dorians were credited with introducing new forms of material culture and to have destroyed the Mycenaean palaces, though both theories created conflicts between the interpretative narrative, the mythological tradition, and the archaeological evidence. The Dorians also became associated with the Sea Peoples, believed to have destroyed several Near Eastern sites at the end of the Bronze Age. During the first half of the twentieth century, scholars attempted to find archaeological and linguistic evidence of the Dorian invasion and to trace its route, though these efforts proved largely unsuccessful.
Müller and his successors, such as Ernst Curtius, considered the Dorians to have been racially and culturally superior to the peoples whom they replaced. German nationalists, following Hermann Müller, portrayed the Dorians as belonging to a Nordic race, and so being fundamentally Germanic in character. The Dorian invasion became connected with the romanticisation of ancient Sparta, and was used to assert a special connection between Prussia and ancient Greece. During the Nazi period, the association between the Dorians and the Aryans became a matter of orthodoxy, and high-ranking Nazis, including Adolf Hitler, integrated the Dorian invasion into their pseudoscientific theories of race. Racialised views of the Dorians remained common in scholarship, both inside and outside Germany, until the 1960s.
Although Müller's narrative of the Dorian invasion received early challenges, particularly from Karl Julius Beloch in 1893, it was only rarely questioned until the decipherment of the Mycenaean Linear B script in 1952. Archaeological discoveries in the 1960s demonstrated that the cultural innovations previously ascribed to the Dorians were spread over a long period, often showing continuity from Bronze Age Mycenaean civilisation, and often arose in regions, such as Attica and Euboea, believed to have been unaffected by the invasion. Throughout the 1980s and 1990s, academic belief in the Dorian invasion declined, to the point where it was generally accepted as a myth. Modern archaeologists explain the collapse of Mycenaean palatial civilisation through factors including social conflicts, climate change, technological developments and the breakdown of the palaces' socio-economic model. Population movements at the end of the Bronze Age are believed to have been relatively small in scale and generally to have been directed away from, rather than towards, the southern Peloponnese.