Who strengthened democracy in Greek?

Cleisthenes, often referred to as the "Father of Athenian Democracy," significantly strengthened democracy in ancient Greece around 508-507 BCE. He introduced reforms that established a more inclusive political system, breaking the power of aristocratic families and allowing broader citizen participation. His restructuring of the political landscape through the creation of new tribes and the Council of Five Hundred laid the groundwork for a more direct form of governance, where citizens could participate in decision-making processes. These changes were pivotal in the development of democratic principles that influenced later political systems.