Pa·tho·cra·cy (noun). A system of government created by a small pathological minority that takes control over a society of normal people; from 'Political Ponerology: A Science on the Nature of Evil Adjusted for Political Purposes', by Andrew M. Lobaczewski.
From Greek pathos, “feeling, pain, suffering”; and kratos, “rule”
A totalitarian form of government in which absolute political power is held by a psychopathic elite, and their effect on the people is such that the entire society is ruled and motivated by purely pathological values.
A pathocracy can take many forms and can insinuate itself covertly into any seemingly just system or ideology. As such it can masquerade under the guise of a democracy or theocracy as well as more openly oppressive regimes.
Source: 'Mort' by Terry Pratchett