Get ready for a chungus amount of info...The two most well known city-states during this period were the rivals: Athens and Sparta. It was the strengths of these two societies that brought the ancient world to its heights in art, culture and with the defeat of the Persians, warfare. It was the same two Greek states whose thirst for more power and territory, and whose jealousy brought about the Peloponnesian wars which lasted 30 years and left both Athens and Sparta mere shadows of their former selves.
The seeds of the classical period were sown in the 8th century with the committing to writing of the works of Homer, the Illiad and the Odyssey, which in a way created a code of conduct  and an ethnic identity for the Greeks. The heroic exploits of Odysseus, Achilles and the other Achaeans served as role models for the Greeks which told them how to behave, (and in some cases, how not to behave) in many situations, particularly on the field of battle and in competition. Just as important in the creating of  a Greek identity was the emergence of the Olympic games and the Oracle of Apollo at Delphi both of which had their roots in the 8th century.
The Spartans
The Spartans who were founded by Lycurgus around 800 BC were known for their militaristic society. These Spartans, known as the Lacedemonians controlled the Peloponessos. The Spartans had not always lived in such a society. Earlier in their history they had produced art, poetry and music and seemed to be on the same course as the rest of Greek civilization which might have led them to give us some of the famous names that have been passed down through history. But from the late 8th Century Sparta fought a war with their neighbors in Messinia to the west and unlike other wars in ancient Greece where an invading army fought, won, worked out a treaty and left (to fight again someday), the Spartans subjugated the entire population of Messinia, reducing them to slaves or helots. These helots were no more than serfs and worked the land for the Spartans. Because the helots vastly outnumbered them, the Spartans had to create a society that would protect themselves not just from external enemies but from a helot revolt from within. Men lived in barracks and male children were taken from their mothers at a young age to learn how to serve the state, meaning the art of warfare. Unhealthy children were killed or left to die. Life had one purpose. To defend the state.
The Spartan Constitution  was credited to Lycurgus who in his travels had studied governments in Crete and Ionia, had read the epics of Homer which strongly influenced his ideas on how a nation should be run. Lycurgus traveled to Delphi for guidance. Told by the Oracle that his laws would make Sparta famous, he returned to convince first his influential friends and eventually all the Spartans that his reforms will bring power and glory to Sparta.  The system of government he created included two Kings, five ephors (executives), a council of thirty elders and a general assembly which was made up of all male citizens. Full citizenship was reserved for the elite, known as the Spartiates who spent much of their time training for and fighting in wars, while their helots worked the land to provide food for the communal mess halls known as syssitia. This is where the Spartiates ate their meals and each was expected to contribute a certain quota of produce every month. Those who could not keep up with their commitment were kicked out and became part of the inferior classes. Children served and then listened to the men discuss state affairs and other topics, as part of their education. Girls were required to exercise and be strong so that they would give birth to strong men. They were also required to dance naked in front of the men to teach them bravery and to be too ashamed to let themselves get fat. The boys learned to read and write but their primary educational goal was to learn to be brave and strong.
Maybe the most frightening of the Spartan institutions were the Crypteia, where young boys were sent to the countryside to live off the land similar to 'Outward Bound' except for a critical difference. These boys were permitted to kill any helot they ran into. This pretty much kept the helots at home.
The Spartans not only feared their own subjugated population but they also feared ideas (like democracy for instance) entering and polluting their system. They would occasionally expel all foreigners and they discouraged commerce and trade by banning ownership of silver and gold, instead using heavy iron coins which were then dipped in vinegar to make brittle. This eliminated the import of luxury items, robbery, bribery, prostitution, jewelry and the amassing of property and resulted in a society where it was impossible to get richer than your neighbor, creating  equality, among the Spartan elite anyway.
