The concept of retributive justice has a long history in law and philosophy, and it is still a widely held belief in many societies today. However, there are also critics of retributive justice who argue that it is not always the best way to achieve justice. Some argue that retributive justice can be too harsh and that it does not take into account the individual circumstances of the offender. Others argue that retributive justice is not effective in deterring crime and that it can actually make crime worse.
Despite these criticisms, retributive justice remains an important concept in law and philosophy, and it continues to play a role in the way that crimes are punished. In the case of Macbeth, Macduff's murder of Macbeth is seen as an act of retributive justice because it is a way of punishing Macbeth for his crimes and restoring balance to the natural order.