Why is Richard III so profoundly evil?

Richard III: Why is Richard III so profoundly evil? In the speech that begins Richard III, the title character gives us an explicit answer to this question: he is evil by his very nature. A misshapen hunchback whose image is unpleasing to the eye, Richard recognizes that he cannot be a lover and so he is "determined to prove a villain" (I, i., l.30). Macbeth is ambitious, and like the protagonist of the Scottish tragedy, …

…into the seeds of time, And say which grain will grow and which will not, Speak to me, who neither not by fear Your favours nor your hate. (Act I, Scene III) Banquo was skeptical of the witches prophecy, thus prohibiting their spell to penetrate his soul, leaving him pure. If Macbeth and Lady Macbeth had not allowed their greed to take over and cause them to murder Duncan, their outcome may have been different