What is an example of allegory in Romeo and Juliet?

In Romeo and Juliet by William Shakespeare, the characters can be seen as allegorical symbols of various qualities or forces. For example, Romeo could represent romantic love, while Juliet represents youthful passion. Other characters, such as Friar Lawrence, could represent wisdom and guidance, while the Nurse could represent a more earthy, practical nature. The play itself can also be seen as an allegory of the dangers of excessive passion and the power of fate, as the two young lovers are ultimately destroyed by their own actions.