The Developer of Democracy: Cleisthenes

Democracy is known to have been developed by Cleisthenes of Athens (570 BC - 507 BC) in Athens, Greece, circa 508 BC.

http://ancienthistory.about.com/library/weekly/aa121900a.htm

http://www.pbs.org/empires/thegreeks/characters/cleisthenes_p1.html

http://www.kat.gr/kat/history/Greek/St/CleisthenesAthens.htm