In George Orwell's 1984, what are the four ways an elite group can fall from power?

In
Goldstein's book thatobtains from , he reads about the nature of Oceania's authoritative regime
and its affinity for absolute power. Winston goes on to read about the four different ways that
an elite group can fall from power, which are as follows:

1. The elite group is conquered from the outside by
another nation. Typically, a nation is attacked and proceeds to acquiesce its territory to the
victor.

2. An elite group can also fall from
power by governing so inefficiently that the disgruntled, oppressed masses come together and
revolt against the hegemony.

3. Another way that
an elite group can fall from power is by allowing a strong discontented middle group or class to
develop and grow.

4. The fourth way that an
elite group can fall from power is by losing their self-confidence and willingness to govern
altogether.