To begin, friar Laurence is responsible for Romeo and Juliet’s death because he formulated the dangerous plan that ultimately led to their tragic demise.
For example, in the play Romeo and Juliet Laurence suggests to Juliet that she take a potion that will make her appear dead in order to avoid marrying Paris.(Act #. Scene #. Lines # -- #)
This plan ultimately backfires when Romeo, who is unaware of the plan, believes Juliet is truly dead and takes his own life out of grief. Additionally, Friar Laurence's failure to deliver a crucial letter to Romeo, informing him of the plan, also contributes to the tragic outcome.
Furthermore, Friar Laurence's decision to marry Romeo and Juliet in secret without their families' knowledge also plays a role in their deaths. This decision sets off a chain of events that ultimately leads to their untimely demise, as the secrecy surrounding their marriage adds to the misunderstandings and miscommunications that ultimately result in the tragic ending.
In conclusion, Friar Laurence's actions and decisions throughout the play significantly contribute to the deaths of Romeo and Juliet. While he may have had good intentions, his flawed plans and lack of communication ultimately lead to the tragic outcome of the play.