Each person plays a part, but I think the one that's most important is: - The Family Feud. The feud between the two family's caused many problems-"The quarrel is between our masters, and us their men". This meant that neither of the family's would have agreed to Romeo and Juliet's marriage, therefore it was kept a secret from everyone except Friar Laurence and the Nurse. When Tybalt challenges Romeo, Romeo doesn't fight as Tybalt is now family-"Capulet which name I tender as dearly as my own". This leads to Mercutio's death, Tybalt's death, and Romeo's banishment from Verona, as the Prince said that anyone fighting would be executed-"If you ever disturb our streets again, your lives shall pay the forfeit of the peace"-which also leads to the Capulets arranging for Juliet to marry Paris-"She shall be married to this noble earl".
- Friar Laurence. He agreed to marry Romeo and Juliet-"This alliance may so happy prove, to turn your households rancour to pure love"-a mistake, but behind good motives, this lead to big problems.
When Romeo is banished, the Friar has a plan to use time to get Romeo pardoned, and get the Capulet's to accept the marriage-"To blaze your marriage, reconcile your friends, and beg pardon of the Prince". But that plan was too vague, so it didn't work. The second plan was to help Juliet, which was also a bad plan. Bringing Romeo back to Verona was risky as he could be executed if he was seen. The Friar was too reliant on the message getting to Romeo(his decision was to die alongside Juliet, he soon did this by drinking a bottle of poison). It was also risky for Juliet, as she has to get out of the tomb and sneak away.
- The Nurse. The...