Although a brief character, Selim el-Hayil's influence is important in the novel. A friend of Frank Chalmers, Selim is a young Arab boy who is passionate about the Arab right on Mars. When Frank tells him John Boone is trying to block their right to expand on Mars, Selim is outraged. He is persuaded by Frank to find a solution to the John problem, and uses Frank's suggestions to kill John. Unknowingly, however, Selim is also killed by Frank, as Frank places a combination of pesticides on him that will end his life. Without John, the revolution begins in earnest as Frank tries to manipulate situations, and is often the victim of false promises.