Greece is surrounded by water on three sides, making it a peninsula. The bodies of water that surround it are the Aegean, Mediterranean, and the Ionian sea. Since it was easy for them to get boats in and out of Greece, trade was easy for them to accomplish. The economy was growing rapidly as goods were being exported and imported from other countries. Being surrounded by the seas also provided them with another food source, keeping more people alive for trade.
The Pindus mountains of Greece made many independent city-states, like