Final answer:
States wish to curb vendettas to prevent social unrest, legal implications, economic instability, and political conflicts, which all can undermine governance and societal stability.
Step-by-step explanation:
The desire to curb and control vendettas by the state's authorities can be attributed to a few key reasons that contribute to a society's stability and governance. Vendettas, which are long-running feuds often involving retaliatory acts of vengeance, can lead to persistent social unrest as they disrupt the peace and order within communities. The perpetuation of such feuds can undermine the rule of law, as individuals take justice into their own hands rather than depending on the legal system to address grievances. This essentially creates a parallel justice system outside of state control, leading to legal implications. Additionally, extensive vendettas can result in economic instability, as they may hinder commerce, discourage investment, and deplete resources that could be used more productively elsewhere. Finally, political conflicts can also be a driving force for states to intervene in vendettas as they may reflect or exacerbate existing power struggles, thus posing a risk to the stability and legitimacy of the government.