* Hunger and Exhaustion: After their long journey and the loss of many men, Odysseus and his crew were exhausted and desperate for food.
* Zeus's Command: The god Zeus, concerned for the safety of Odysseus, sent a west wind that drove the men off course.
* The Sirens: The men were unable to resist the lure of the Sirens, who led them astray.
* The Crew's Lack of Discipline: Odysseus's men, weakened by hardship and temptation, lacked the discipline and foresight to stay on course.
Therefore, it was a combination of circumstances, both external (Zeus's intervention, the Sirens) and internal (hunger, exhaustion, lack of discipline), that led to Odysseus's fateful stop on the island of Helios.
