▁social ▁action ▁system , ▁the ▁AG IL ▁parad ig m , ▁according ▁to ▁Par s ons , ▁yields ▁four ▁inter related ▁and ▁inter pen etr ating ▁sub system s : ▁the ▁behavior al ▁systems ▁of ▁its ▁members ▁( A ), ▁the ▁person ality ▁systems ▁of ▁those ▁members ▁( G ), ▁the ▁social ▁system ▁( as ▁such ) ▁( I ), ▁and ▁the ▁cultural ▁system ▁of ▁that ▁society ▁( L ). ▁To ▁analyze ▁a ▁society ▁as ▁a ▁social ▁system ▁( the ▁I ▁sub system ▁of ▁action ), ▁people ▁are ▁pos ited ▁to ▁en act ▁roles ▁associated ▁with ▁positions . ▁The ▁positions ▁and ▁roles ▁become ▁differenti ated ▁to ▁some ▁extent ▁and , ▁in ▁a ▁modern ▁society , ▁are ▁associated ▁with ▁things ▁such ▁as ▁occup ational , ▁political , ▁jud icial , ▁and ▁educational ▁roles . ▁ ▁Consider ing ▁the ▁inter relation ▁of ▁these ▁special ized ▁roles ▁as ▁well ▁as ▁function ally ▁differenti ated ▁collect iv ities ▁( like ▁fir ms ▁and ▁political ▁parties ), ▁a ▁society ▁can ▁be ▁analyz ed ▁as ▁a ▁complex ▁system ▁of ▁inter related ▁functional ▁sub system s : ▁ ▁The ▁pure ▁AG IL ▁model ▁for ▁all ▁living ▁systems : ▁ ▁( A ) ▁Ada pt ation . ▁ ▁( G ) ▁Go al ▁att ain ment . ▁ ▁( I ) ▁Integr ation . ▁ ▁( L ) ▁L aten cy ▁( pattern ▁maintenance ). ▁ ▁The ▁Social ▁System ▁Level : ▁ ▁The ▁economy   — ▁social ▁adaptation ▁to ▁its ▁action ▁and ▁non - action ▁environmental ▁systems ▁ ▁The ▁polity  