es several points about the nature of evil. The first point is that evil is contrary to human nature. Macbeth and Lady Macbeth have to contort their natures to murder Duncan. First, Lady Macbeth has to beg evil spirits to tear all human feeling from her, and then she has to make her husband ignore his own conscience. But the play also says that human nature cannot be avoided indefinitely. By the end of the play, both characters have been destroyed from within. Fear and guilt drive Lady Macbeth mad; Macbeth sees life as an empty, meaningless charade. The second point is that it is evil to disrupt the natural order of the world. In nature, everything happens in its own time. A flower blooms when the laws of nature say it should, neither sooner nor later. When Macbeth takes the crown by murder, he upsets the natural order of his life- and the order of Scotland. Without the rightful, God-given king on the throne all society is disordered; under a usurper there can only be evil and chaos. Even nature becomes upset: it's dark during the day; horses eat each other; owls kill falcons. Nearly every scene has references to unnatural deeds or occurrences. When Macbeth is killed and Malcolm takes the throne, the natural order is restored. The third point is that evil is a disease. Like a disease, evil infects its victims and makes them sicken until they die. Once Macbeth kills Duncan, he is committed to a course of lying and killing. His sense of right and wrong is eaten away. Even before he is killed, Macbeth is dying of a diseased spirit. Scotland is also infected, and Macbeth is its disease. The longer he is king, the worse things get. When Macbeth is overthrown, the country is healed. 2.AMBITION Many readers feel that Macbeth's downfall is caused by his ambition. At the beginning of the play, Macbeth seems to be a brave, noble, and loyal thane. For his desire to become king, he is willing to turn his back on what he knows to be right. Lady Macb...