How is 509 BC coup connected to rise of democracy.

History of democracy: Athens, Greece. Potsherd used to vote for Themistocles (can you see his name written on it?) The earliest democracy in the world began with the work of a man named Cleisthenes, in Athens, in 510 BC. 

a system of government by the whole population or all the eligible members of a state, typically through elected representatives. "capitalism and democracy are ascendant in the third world" representative government, elective government; self-government, government by the people; republic, commonwealth "freedom of speech is essential to democracy."  There is an important discovery being made here--the European-Romans, debut their unlawful hegemony rule career in 509 BC with a coup de'tat on Etruscan Kingdom, and instantly ID themselves as Roman republic. Then subsequently, democracy was born in 510 BC, you should be able to see the how European do their  business.