The Greek ruler who changed the basis of representation from families to territories was Cleisthenes.
- Cleisthenes, sometimes known as Clisthenes, was an ancient Athenian lawgiver who is credited for rewriting ancient Athens' constitution and putting it on a democratic footing in 508 BC. Historians describe to him as "the father of Athenian democracy" because of his achievements. He belonged to the aristocratic Alcmaeonid family.
- Cleisthenes, the Athenian leader, developed a system of political changes known as demokratia, or "rule by the people," in 507 B.C. It was the world's first known democracy.
- Cleisthenes was successful in uniting the people Assembly against the nobles (508) and imposing democratic change. Perhaps his most significant innovation was to base individual political responsibility on citizenship rather than membership in a tribe.
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