To wit: launching a grand patriotic endeavor with much fanfare and overwhelming public support (exploiting a sense of national unity and purpose fostered by the recent war), having that endeavor set up a secret parallel justice system answerable to nobody, indefinite detentions...
oh, and the ensuing clashes between the wronged and the merely indifferent... the lowly everyday employees in the terrible scheme for world domination who wish they could get out of it, or do something about it, but fear for their lives and their futures...
(Postscript. Then there's a bunch of Christian allegory tacked on inelegantly, which, as Orwell pointed out, undermines the dystopian horror - c.f. http://www.lewisiana.nl/orwell/ )