The Iliad is the greatest literary achievement of Greek civilization. The story centres on the critical events in four days of the tenth and final year of the war between the Greeks and Trojans. It describes how the quarrel of Agamemnon and Achilleus sets in motion a tragic sequence of events, which leads to Achilleus' killing of Hektor and determines the ultimate fate of Troy. But Homer's theme is not simply war or heroism. With compassion and humanity he presents a universal and tragic view of the world, of human life lived under the shadow of suffering and death, set against a vast and largely unpitying divine background. The Iliad is the first of the world's great tragedies.