Macbeth's tragedy is that of a good, brave and honourable man turned into the personification of evil by the workings of unreasonable ambition.
Macbeth is overwhelmed by a triple alliance: the witches' prophecies, his own ambitions and those of Lady Macbeth.
Lady Macbeth:
"... yet do I fear thy nature,
it is too full o'th' milk of human kindness
to catch the nearest way: thou wouldst be great,
art not without ambition, but without
the illness should attend it..."
atto I, scena V
Lady Macbeth and Iago are personifications of the evil. While Iago is pure evil, since he acts without a reason, lady Macbeth acts under the strength of her love for his husband.
Is there a difference, in the end, in the evil they cause?
