Sparta was unique in ancient Greece for its social system and constitution, which configured their entire society to maximize military proficiency at all costs, and completely focused on military training and excellence. Its inhabitants were classified as Spartiates (Spartan citizens, who enjoyed full rights), mothakes (non-Spartan free men raised as Spartans), perioikoi (free residents, literally "dwellers around"), and helots (state-owned serfs, enslaved non-Spartan local population).