Ancient Greece: The period in Greek history from the 8th century BC to the 6th century AD. It was a time of great philosophical, political, scientific and cultural development.
Democracy: A system of government where power is vested in the people who rule either directly or through freely elected representatives. Originated in Athens during Ancient Greece.
Philosophy: The study of fundamental questions about existence, reality, knowledge, values etc., often associated with Greek thinkers like Socrates, Plato and Aristotle.