As social systems increase in complexity, they must monitor the relationshi
ps among their internal components carefully, to see that their functioning
is harmonious. The internal components must not only meet their own needs,
but must meet the overall needs of the total society as well. If this is n
ot done adequately, the society could face an alarming increase in internal
entropy, to its great peril. However, in attending to internal needs, the
complex society cannot neglect the need to monitor and react to a variety o
f external flows, including monetary and information flows. This paper comb
ines social entropy theory and autopoiesis theory to analyze the relationsh
ips between internal and external relations in a complex social system. Sou
th and North Korea are used as illustrations. An important issue is how a n
ation's boundaries are controlled. This is discussed briefly, and five mode
ls of boundary control are presented. North Korea is shown to have a model
1 system, while South Korea has a model 4 system.