How are adults presented in Romeo and Juliet?
There is a large difference between youths and adults in Romeo and Juliet. The adults often make emotionally driven decisions, often ones that go back on what they have previously said. An example of this is Lord Capulet, who changes his mind on the marriage of his daughter. This drastically changes the plot of the story and could have been the reason for the death of Romeo and Juliet.
They see the world in a different light to the youths.
The younger men in the Montague and Capulet families love to fight, and would happily insult the other family in order to start a fight. However, Lord Capulet, and maybe Lord Montague, is less happy to begin the fight, although he would try to join in, like in act one scene 1. Lord Capulet says "'tis not hard. I think / for men as old as we to keep the peace" and later on in the play he also compliments Romeo by calling him a "virtuous and well-governed youth".
Capulet and Montague could have ended a feud, which was started by their ancestors "ancient grudge breaks to new mutiny". You do not find out what Lord Montague thinks about the feud, only that Capulet "thinks" that Montague has the same opinion as he.
Later in act 1 scene 5 Capulet gets very angry with Tybalt for wanting to start a fight with Romeo. Capulet expects Tybalt to obey him, as he is the master of the house. When Tybalt still refuses to give in to Capulet, his multi faceted side comes out. Capulet changes from arguing to Tybalt "Marry, 'tis time" to complementing the guests "Well said, my hearts!" and then back to arguing with Tybalt.
Lord Capulet loves his...