Greece is a small European country characterized by its mountainous terrain and numerous islands, leading to the development of independent city-states rather than a unified nation. Historical periods include the rise of powerful city-states like Athens and Sparta, democratic governance in Athens under Pericles, and a rich cultural tapestry influenced by mythology, philosophy, and religious practices. Key figures include philosophers Socrates, Plato, and Alexander the Great, contributing to Greece's lasting legacy in various fields.