The feud between the Capulets and the Montagues has been going on for a very long time. (Shakespeare does not give us a time frame for the feud or reason.) The feud is the entire basis for the play. Romeo is from the Montague family and Juliet is from the Capulet family. There is no way that their parents would have agreed to a marriage between the two children. Because of the feud, there is a major conflict that develops. They decide to get married without their parents' knowledge or consent and hide the marriage. They try and escape from the consequences of their marriage after the fight between Mercutio, Tybalt, and Romeo. Romeo and Juliet cannot be honest about their relationship with anyone, cannot proclaim their love for each other to anyone because of the feud. They make irrational decisions and only think about themselves. As a result, the play ends in tragedy with Romeo and Juliet killing themselves.