The play West Side Story, by Arthur Laurents, is based upon the play Romeo and Juliet, by William Shakespeare. Despite a few differences, both works, in essence, have the same plot. The source of violence in Romeo and Juliet and West Side Story is the ever-present hatred between families and between gangs, although, because of the "star-cross’d lovers" motif in Romeo and Juliet, the hatred plays a larger role in producing the ending of West Side Story than it does the ending of Romeo and Juliet. The tension and hatred between gang ....