because he wanted to become king. he also wanted to get rid of his kids (one of whom would be heir to the throne) but they flead making him the new king.
the above ans is does not answer the question FULLY. Macbeth is not entirely evil, he does think he shouldn't really kill Duncan. He thinks three reasons: He is his kinsman and host (therefore it is entrusted with him to look after his guest) and finally Macbeth is his subject. Lady Macbeth does however manipulate Macbeth into killing Duncan as she insults and questions his manhood when he wishes to go no more in their plan. Even though there is many reasons against killing Duncan there is only one true reason his deep dark desire which was awoken be the witches in the first scene of the Scottish Play. Duncan's children fled from Scotland as they feared for their lives. They thought there was 'daggers in men's smiles'. This left Macbeth and Lady Macbeth as King and Queen of Scotland...
(cracks fingers)
NO! Lady Macbeth does not kill king Duncan's Guard Macbeth does to prove his guilt.
Macbeth kills Duncan in his own castle at night time.
The reaction between Lady Macbeth and Macbeth is initially very different after they kill Duncan. Lady Macbeth is enthusiastic but Macbeth regrets his actions.
Macbeth believes he has to kill Duncan's guards in case they heard anything happen in the room while Macbeth was killing Duncan.
Yes Macbeth did hesitate to murder King Duncan, he went through allot of mental turmoil about this decision. In his soliloquy he gave good reasons for not wanting to kill Duncan 1)he is not a bad king 2) he is there in double trust. In the end Macbeth did not want to kill Duncan but it was Lady Macbeth's persuasion that caused him to commit the act. In comparison Macbeth had no hesitate in killing Banquo and Lady Macduff.
why was macbeth releuctant to kill duncan
To inherit Duncan's Throne
NO! Lady Macbeth does not kill king Duncan's Guard Macbeth does to prove his guilt.
She gives him the weapon and the opportunity.
Lady Macbeth convinces Macbeth to kill Duncan by questioning his masculinity and invoking his ambition for power. She manipulates him into believing that murdering Duncan is the only way to achieve their goal of becoming king and convinces him that they can get away with it.
Macbeth kills Duncan in his own castle at night time.
The reaction between Lady Macbeth and Macbeth is initially very different after they kill Duncan. Lady Macbeth is enthusiastic but Macbeth regrets his actions.
She didn't want to kill him herself, because she said Duncan looked like her dad while he slept. She did have Macbeth murder Duncan nonetheless
Macbeth believes he has to kill Duncan's guards in case they heard anything happen in the room while Macbeth was killing Duncan.
he reminds her of her father
she gets the guards drunk so that they pass out allowing Macbeth to kill duncan.
Malcolm (Duncan's son) did not kill Macbeth, it was Macduff (Thane of Fife).