What is it that Goldstein says holds the ruling members of the party together and ensures the survival of the party?Part 2 chapter 9
Goldstein offers a complex answer to this question. There are actually many methods the ruling members use to ensure the suvival of the Party because they have to address all features of humanity that could alter ruling class.
1. They determine who gets to be in the Inner and Outer Party by giving a test, not by birth. This alienates the usual features of family to be loyal and faithful. Instead, everyone understands they will just be placed accordingly.
2. They perpetuate war because it keeps the people in need for a ruling class to lead them. This also keeps an efficiency of goods, because of war, supplies and products are used and the people have no reason to complain.
3. They ensure the desire to keep ruling by determining selectively who gets to be a part of the Inner Party, and then Inner Party members do get more benefits and privileges.
Here is the section of the chapter quoted exactly in case you need to defend these ideas with a quote:
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 factor is the mental attitude of the ruling class itself.