totalitarian

nouns

an adherent of totalitarian principles or totalitarian government
is a type of (narrower)
someone who believes and helps to spread the doctrine of another

adjectives

characterized by a government in which the political authority exercises absolute and centralized control
"a totalitarian regime crushes all autonomous institutions in its drive to seize the human soul"- Arthur M.Schlesinger, Jr.
is similar to
not in agreement with or according to democratic doctrine or practice or ideals
"the union broke with its past undemocratic procedures"
of or relating to the principles of totalitarianism according to which the state regulates every realm of life
"totalitarian theory and practice"; "operating in a totalistic fashion"
pertains to