Complex sentence: Equilibrium is set in a future-state of Libria in 2072 after a Third World War devastated the Earth, a totalitarian state emerged whose ideology determined human emotion to be the root cause of conflict.
Split into simpler sentences: Equilibrium is set in a future-state of Libria. After a Third World War devastated the Earth, a totalitarian state emerged whose ideology determined human emotion to be the root cause of conflict.