"...from the Greek θεοκρατία (theokratia), meaning `the rule of God’ (Josephus). This in turn derives from the Greek words θεος (theos, from an Indo-European root occurring in religious concepts), meaning `god,’ and κρατειν (kratein), meaning `to rule.' Thus the meaning of the word in Greek was `rule by god(s)' or human incarnation(s) of god(s)." (Wikipedia)
