synoikismos

Synoikismos (or synoecism) refers to the process of uniting several towns or villages into a single community, a key aspect of ancient Greek polis formation. This unification could manifest in two ways: a physical concentration of people into one city or a political unification that allowed dispersed populations to remain in their villages while still being part of a single political entity.12

The historian Thucydides distinguished between these two forms, noting that Attica was politically unified early on but only physically consolidated with the population moving behind Athens' walls in 431 BCE. Sparta, conversely, remained physically dispersed, existing as a collection of villages. The exact factors driving polis formation are debated, with theories pointing to monumental building projects, the placement of rural sanctuaries, changes in burial practices, geographical influences, and the impact of colonization and Phoenician interactions.2