In the totalitarian society depicted in Orwell's 1984, Ingsoc is the governing political philosophy. Its name is derived from "English Socialism," which, as the name implies, is an English variation of socialism and which the Oceanian state aims to put into practice.
Socialism claims to be a universal creed based on the international brotherhood of man. Yet Ingsoc, or English Socialism, is thoroughly nationalistic in its orientation. It thrives on the idea that Oceania is always at war with one enemy or another. It generates intense hatred among the population against those not deemed to be part of the nation.
Not only that, but it also encourages fear of enemies both internal and external. This has the effect of making people instinctively look to the all-seeing, all-powerful Big Brother for protection.
Far from being a liberating ideology, then, Ingsoc is actually concerned with keeping the people down, with keeping them in a state of permanent hatred and fear, the better to control them.
It does this through the use of Newspeak and doublethink, techniques of manipulation that combine to control the nature of reality itself. As a consequence, in Oceania, there is no independent reality beyond that approved by the ideology of Ingsoc through the organs of the Party and the state.