There are only four ways in which a ruling group can fall from power. Either it is conquered from without or it governs so inefficiently that the masses are stirred to revolt or it allows a strong and discontented Middle group to come into being or it loses its own self- confidence and willingness to govern. These causes do not operate singly and as a rule all four of them are present in some degree. A ruling class which could guard against all of them would remain in power permanently. Ultimately the determining factors is the mental attitude of the ruling class itself.
From the backcover
Orwell's final novel, 1984, is the story of one man's struggle against the ubiquitous, menacing state power (Big Brother) that tries to dictate nearly every aspect of human life. The novel is a classic in anti-utopian fiction, and a trenchant political satire that remains as relevant today as when it was first published. First appeared in 1949, this novel seemed like a nightmarish vision of the future in a totalitarian world. Playing on the public's worst fears about governmental control, different readings saw the former Soviet Union as the object of satire, while others focused on increasingly powerful democratic governments.