Who is "most guilty" is definitely an arguable question, but here are some plausible suggestions. The collapse of the support system for the young couple begins at the top. The prince of Verona fails to control his subjects. Juliet’s parents, particularly her father, sets a bad example and continually makes poor choices. The Roman Catholic Church is at fault as well, for the friar whom the pair trusts also misguides them. Lastly, because the couple has no strong adult to turn to, they are forced to rely on their own immature abilities to reason. The combined results of all these factors result in tragedy.