What is the universal meaning in Macbeth? And how are Macbeth and Lord of the Flies connected/or different?Help!

While the ambition for power is a theme shared by the play and the novel, and Jack and Macbeth both become corrupted by their desire for power, the two stories end differently.  Order is restored in both cases:  in Macbeth, through his death in a battle with Macduff definitively carrying on stage the head of the dead Macbeth, but in Lord of the Flies  the arrival of a ship interrupts a battle and saves Ralph’s life.  Macbeth is more optimistic:  the tragic hero learns his lesson before he dies, and we know goodness will rule.  In Lord of the Flies, we are not so sure, for when the naval officer looks away from Ralph’s tears and out at sea, Golding seems to suggest that the violence the boys lived is a fundamental part of human interaction that will not go away.