information:extraction, structural:summarization
Prehistory, "dark age" and archaic period

The prehistory of Sparta is difficult to reconstruct because the literary evidence was written far later than the events it describes and is distorted by oral tradition. The earliest certain evidence of human settlement in the region of Sparta consists of pottery dating from the Middle Neolithic period, found in the vicinity of Kouphovouno some two kilometres (1.2 miles) south-southwest of Sparta.

This civilization seems to have fallen into decline by the late Bronze Age, when, according to Herodotus, Macedonian tribes from the north (called Dorians by those they conquered) marched into the Peloponnese and, subjugating the local tribes, settled there. The Dorians seem to have set about expanding the frontiers of Spartan territory almost before they had established their own state. They fought against the Argive Dorians to the east and southeast, and also the Arcadian Achaeans to the northwest. The evidence suggests that Sparta, relatively inaccessible because of the topography of the Taygetan plain, was secure from early on: it was never fortified.

Nothing distinctive in the archaeology of the Eurotas River Valley identifies the Dorians or the Dorian Spartan state. The prehistory of the Neolithic, the Bronze Age and the Dark Age (the Early Iron Age) at this moment must be treated apart from the stream of Dorian Spartan history.

The legendary period of Spartan history is believed to fall into the Dark Age. It treats the mythic heroes such as the Heraclids and the Perseids, offering a view of the occupation of the Peloponnesus that contains both fantastic and possibly historical elements. The subsequent proto-historic period, combining both legend and historical fragments, offers the first credible history.

Between the 8th and 7th centuries BC the Spartans experienced a period of lawlessness and civil strife, later attested by both Herodotus and Thucydides. As a result, they carried out a series of political and social reforms of their own society which they later attributed to a semi-mythical lawgiver, Lycurgus. Several writers throughout antiquity, including Herodotus, Xenophon, and Plutarch have attempted to explain Spartan exceptionalism as a result of the so-called Lycurgan Reforms. Xenophon, Constitution of the Lacedaimonians, chapter 1