Final answer:
Confederate President Jefferson Davis and other leaders like John Adams have played crucial roles in quelling mob anger by combining empathy, threats of force, and legal defense to restore order and peace.
Step-by-step explanation:
The individual primarily responsible for quelling the anger of the mob is often a figure of authority or leadership within the society. For example, Confederate President Jefferson Davis took direct action to address and calm a riot by offering sympathy, money, and food, while also threatening military action. Similarly, during the British soldiers' trial post-Boston Massacre, John Adams argued against the mob's lawlessness and defended the necessity of law and order. Such actions by leaders are critical in restoring peace and preventing chaos.