Why did the Montagues and Capulets start fighting?
In this regard, why are the Capulets and Montagues fighting?
The Prologue merely refers to the feud between the Montagues and Capulets as an "ancient grudge" with no further explanation as to why the two families hate each other. One of Shakespeare's points is that the violence and feuding that ends with the death of Romeo and Juliet is senseless.
Similarly, who restrains Capulet and Montague from fighting? Benvolio
Similarly, did the Montagues and Capulets stop fighting?
The feud between the Capulet and the Montague did not end. The two lovers did kill themselves and it says that the feud will end in the prologue.
How does the fight start in Romeo and Juliet?
The scene opens with a brawl on the streets of Verona between servants from the affluent Montague and Capulet households. While attempting to stop the fight, Benvolio (Romeo's cousin) is drawn into the fray by Tybalt, kinsman of the Capulets.