Friar Laurence most offers hope that the feud between the Capulets and Montagues could end. When Romeo first comes to Friar Laurence to arrange his marriage to Juliet, Friar Laurence consents. He says, "In one respect I'll thy assistant be,/ For this alliance may so happy prove/ To turn your households' rancor to pure love" (2.3.98-99). He chooses to marry the two because of his hope that the marriage will end the feud. Even after Romeo kills Tybalt, he has not lost hope in the lovers' abilities to bring their families together. He tells Romeo, "For then thou canst not pass to Mantua; / Where thou shalt live, till we can find a time./ To blaze your marriage, reconcile your friends, / Beg pardon of the prince, and call thee back / With twenty hundred thousand times more joy/ Than thou went'st forth in lamentation" (3.3.20130-2035). Friar Laurence gives Romeo hope that the consequence of banishment for Tybalt's death will be overturned and everyone will be reconciled. He holds out hope that the feud between the Capulets and Montagues could end with the love of Romeo and Juliet. At the end of the play, and in the Prologue, he is proven right. When the bodies of Romeo and Juliet are found, the parents end their feud and mourn the deaths of their children.
A character that brings much hope to the feud between the families is Prince Escalus. The Prince is desperate to end the feud between the Capulets and Montagues. An example of him trying to douse the ''flames of hatred'' so to speak would be when he punishes Capulet and Montague for the fight between Tybalt and Benvolio. He loathed to execute Romeo for Tybalt's death and instead banished him which was a vain hope the Montague house would understand the gravity of their actions and would cease fighting. After Juliet and Romeo commit suicide he decrees the two houses guilty of killing them and condemns the feud. Thus the Capulets and Montague families absolve their hatred for one another. (Apologies this took so long to write! Hope it helps!)