The geography of ancient Greece, located along the Mediterranean Sea, influenced the development of early Greek civilization. The mountains, seas, and islands separated city-states and forced settlement along coasts and on islands, encouraging trade. Two early trading cultures emerged, the Minoans on Crete and the Mycenaeans on the mainland. The Greeks later created independent city-states like Athens and Sparta for protection. Athens developed as a center of culture, democracy, and trade while Sparta focused on military strength.