In the 8th century BCE, Sparta’s conquest of Messenia helped create (and expand) the helot system—an unfree labor force tied to the land. Helots farmed and delivered fixed shares of produce that supported Spartan citizens. This system shaped Spartan society by freeing citizens for military training while generating constant fear of revolt.
A later major conflict, often dated to about 660–650 BCE, is traditionally called the Second Messenian War. In Greek historical memory it is linked to renewed resistance in Messenia and to the hardening of Spartan rule over a large dependent population. Over time, Spartan institutions and security practices increasingly reflected the need to manage helot labor and prevent rebellion.
Around 594 BCE, the lawgiver Solon introduced reforms often associated with the seisachtheia (“shaking off of burdens”). These measures are remembered for canceling certain debts and ending the enslavement of Athenian citizens for debt. The change did not end slavery in Athens, but it reshaped who could be enslaved and encouraged greater reliance on purchased, non-citizen slaves.
In 508 BCE, Cleisthenes reorganized the Athenian citizen body into new tribes and political units, laying major foundations for Athenian democracy. The reforms increased citizen participation in government while leaving enslaved people and most foreigners outside citizenship. This created a political system where public decision-making by citizens could coexist with widespread unfree labor.
In 483 BCE, a major silver find at Laurion provided Athens with an economic windfall. Athenian leaders chose to invest the revenues in building a large fleet, linking mineral extraction to military power. Mining and processing relied heavily on enslaved labor, helping connect slavery to state finance and imperial capacity.
In 464 BCE, a severe earthquake struck Sparta and was followed by a large helot uprising, often linked with resistance centered at Mount Ithome. Sparta sought allied help, including from Athens, reflecting how dangerous a mass labor revolt could be for a society dependent on coerced agriculture. The crisis reinforced Sparta’s preoccupation with internal control as a condition for its military system.
By the 5th century BCE, Athens used “public slaves” (dēmosioi) for state tasks, including administrative work and public order. Ancient sources and later scholarship connect some of these roles with the so-called Scythian archers, a publicly owned policing force. This shows that slavery in Athens was not only private household labor but also part of the machinery of government.
During the Peloponnesian War, Athenian debates could explicitly involve enslavement as punishment and profit. In 427 BCE, after revolt by Mytilene, Athenians initially voted for extreme reprisals and later reconsidered, as reported by Thucydides. The episode illustrates how slavery functioned as an instrument of war, discipline, and economic extraction in the Greek city-state system.
Around 425 BCE, the writer often called the “Old Oligarch” argued that Athens tolerated unusual behavior from slaves and resident foreigners because of its naval empire. He claimed that a maritime power needed money and manpower, and so made practical choices—even if elites disliked them. The passage is important evidence that contemporaries linked Athenian sea power, labor, and slavery to the city’s political order.
In 413 BCE, Sparta established a permanent base at Decelea in Attica, intensifying pressure on Athenian territory. Ancient accounts report that many enslaved people fled Athens during this period, disrupting household and industrial labor, including mining. The loss highlighted how Athenian production and state revenues depended on coercion that could break down under military stress.
In 355 BCE, Xenophon wrote Ways and Means (also known as Poroi), a plan to strengthen Athens’ public finances after military and political setbacks. Among other revenue ideas, the work is closely associated with the Laurion mines and the role of labor in restoring state income. As a closing marker, it shows slavery and mining still discussed as tools of public economic policy in the late Classical period, even as Athenian power was changing.
In the 4th century BCE, Aristotle’s Politics defended the idea that some people are “slaves by nature,” while also distinguishing this claim from slavery imposed purely by law or force. His discussion shows that slavery was not only an economic institution but also a subject of ethical and political theory. The text became a long-lasting reference point for later debates about slavery and power.
Classical Greek Slave Economy: Athens and Sparta (6th–4th century BCE)