The most interesting part is the very first line: “Two households, both alike in dignity…”
Why are the Montagues and the Capulets fighting? It’s never made clear. Perhaps they fight not because there are irreconcilable differences between them, but because they’re the same. Their struggle is Girardian, not Marxist.
Few people appreciate the point. So many love stories claim to be based on Romeo and Juliet, e.g. the vampire boy or zombie boy and the human girl. Romeo and Juliet doesn’t depict a rational conflict, only an ancient one.