Final answer:
In George Orwell's novel 1984, aside from Oceania's Ingsoc, the other two superstates follow their own political philosophies: Eurasia with Neo-Bolshevism and Eastasia with Death Worship or Obliteration of the Self.
Step-by-step explanation:
The other two superstates' philosophies mentioned alongside Oceania's Ingsoc in George Orwell's dystopian novel 1984 are Neo-Bolshevism and Death Worship, or Obliteration of the Self. These are the philosophies attributed to Eurasia and Eastasia, respectively.
In 1984, Orwell presents a world divided into three warring superstates, each with their own distinct ideological systems, mirroring the cold war tensions and the ideological battles of Orwell's time. Oceania follows Ingsoc, or English Socialism, Eurasia adheres to Neo-Bolshevism, and Eastasia is guided by the philosophy of Death Worship. These philosophies serve to justify the totalitarian regimes of the superstates and to perpetuate a state of perpetual war between them.