How Cleisthenes and Pericles Shaped Athenian Democracy

Cleisthenes' Reforms (508/7 BCE) — The Structural Foundation

• Ten geographic tribes replaced four kinship-based tribes, breaking aristocratic factionalism and mixing citizens across regions.
• Council of 500 (Boule) — 50 members from each tribe, chosen by lot, met daily to set the Assembly's agenda.
• Ostracism — annual vote to exile a perceived threat for 10 years (property confiscated, status retained). A safety valve against tyranny.
• People's Courts (Heliaia) — large juries (200–6,000) selected by lot from citizens; heard appeals, tried officials, guarded constitutionality.

Pericles' Reforms (461/0 BCE) — Deepening Participation

• Lowered property qualification for archonship (top magistracy), opening office to the zeugitai (hoplite class) and eventually thetes (landless).
• Introduced pay for public service — jury duty (2 obols/day), Council, Assembly attendance. Enabled poor citizens to participate without financial ruin.
• Strengthened the Assembly (Ekklesia) — became the supreme sovereign body; any citizen could speak, propose, vote. Aristocratic influence (Areopagus) diminished.

Result

Athenian democracy became direct, participatory, and inclusive (for male citizens)—unprecedented in scale and depth. Women, slaves, metics excluded. But the institutional architecture—sortition, rotation, accountability, paid service—remains a touchstone for democratic theory.