One of the main reasons of the decline of the city state of Sparta was its inability to replace citizens lost in the everlasting wars. That was due to the exclusivity of the spartan society. I am not going to detail the sparta society but i was wondering what would be the results if right after the peloponisian war Spartan leaders decided to accept the sons of perioikous as Spartans after they pass the rather rigorous agogi. Also if the first step was successful would that be extended to the willing and forced allies? In other words could Sparta become a facilitator of early Greek unity in a militaristic state modeled after Sparta itself. I know it is highly unlikely the Spartan society would change its social structure but what if their leaders realized their eventual demise due to population decrease?