Right.
Democracy originated in ancient Greece.
Iceland claims to be the oldest continuous democracy -- over 1,000 years old.
http://www.government.is/how-iceland-is-governed/
Which earlier civilizations practiced direct democracy?
A: The ancient Athens practiced direct democracy.
3 answers
Should I include the ancient Greeks as a civilization as well?
Athens was one of the major cities in Greece. Athens is the better answer for your question.