The Dispossessed — Ursula K Le Guin

The Principle of Simultaneity will revolutionize interstellar civilization by making possible instantaneous communication It is the life work of Shevek a brilliant physicist from the arid anarchist world of Anarres Shevek s work is being stifled by jealous colleagues so he travels to Anarres s sister planet Urras hoping to find more tolerance there But he soon finds himself being used as a pawn in a deadly political game