Answer:
The Spartan way of life was, in the Peloponnesian War as in all wars before and after, their greatest advantage: absolute loyalty to their autocratic kings coupled with a nearly undefeatable army gave the Spartans staying power that the Athenians, subject to the whims of the civilian population, could never match. Spartiates were the best soldiers and did not have to be paid wages. Disadvantages of the military society: Surrounded by hostile city-states. Unhealthy babies were left to die.