The play highlights the warring factions in England at the time of the Cousin's War, what history now calls, The Wars of the Roses.
Both Montague and Capulet can be seen to represent either the House of York, or of Lancaster,, Henry V1 or Richard 111. Romeo and Juliet as the confused English yeomanry, forced into a war they knew little about or who was fighting it.
The two feuding families are the Capulets and the Montagues. They play a very important role in Romeo and Juliet.
"Two households, both alike in dignity/ In fair Verona where we lay our scene". Thus begins Chorus, and the delivery of his opening sonnet to the tragedy Romeo MONTAGU loves Juliet CAPULET, but neither family, powerful in Verona, can admit it so.