why di macbeth murder duncan?

Why Did Macbeth Murder King Duncan?

At the beginning of the play Macbeth is portrayed as a great conquering hero to his country and is extremely loyal to his King. He risked everything for them both including his own life. Even when Macbeth and Banquo were outnumbered significantly, they were still fearless and fought on!

“For brave Macbeth - well he deserves that name - Disdaining Fortune, with his brandish'd steel, which smoked with bloody execution, like valour's minion carved out his passage ill he faced the slave;”

“As cannons overcharged with double cracks, so they doubly redoubled strokes upon the foe:”

When King Duncan hears of Macbeth’s heroics, he is extremely pleased with Macbeth’s loyalty and his service to him and his country. He also hears how The Thane of Cawdor betrayed him and his country and he is absolutely dismayed. He explains how he had every bit of his trust in The Thane of Cawdor. He tells Ross, a warrior who brought King Duncan the messa...