The ambition of the character Macbeth in Shakespeare's play "Macbeth" is a driving force that ultimately leads to his downfall. At the beginning of the play, Macbeth is a respected and successful general in the Scottish army, but he becomes consumed by his desire for power and position.

Upon receiving a prophecy from three witches that he will one day be the King of Scotland, Macbeth becomes ambitious and begins to plot his rise to the throne. He becomes convinced that the only way to fulfill the prophecy is to kill King Duncan and take his place as ruler. Despite his reservations and the misgivings of his wife, Macbeth ultimately decides to carry out the murder.

However, Macbeth's ambition does not end with the death of Duncan. He becomes paranoid and afraid that others will challenge his position as king, leading him to commit more murders and acts of betrayal. His ambition becomes a driving force that consumes him and ultimately leads to his downfall.

The ambition of Macbeth serves as a cautionary tale about the dangers of unchecked desire for power and position. It shows how the pursuit of ambition can lead to selfish and destructive actions, and ultimately to ruin. Macbeth's ambition ultimately causes his own downfall and serves as a warning to others about the dangers of letting ambition consume them.