Complex sentence: The superstate is under the control of the privileged elite of the Inner Party, a party and government that persecutes individualism and independent thinking as "thoughtcrime", which is enforced by the "Thought Police".
Split into simpler sentences: The superstate is under the control of the privileged, elite Inner Party. The Inner Party, or Party, persecutes individualism and independent thinking known as "thoughtcrimes" and is enforced by the "Thought Police".