Macbeth's flawed character and what contributed to his downfall?

Question

i really need help with this question its for school and i dont no anything about macbeth and i gotta do a speech on it :S

Answer 1

Macbeth's fatal flaw was ruthless ambition. Ergo, he was relentless in his quest to be king. Let me know if you need more.  

Answer 2

Macbeth was controlled by his fears and by hi wife. Also his superstition mixed witg his over confidence, When he did not fully understand the witches warnings he chose to ignore them. by listening to his wife and being led by his wife and ignoring his own ituition he also was doomed

Macbeth also was feeling guilty, wich impaired his judgement