After reviewing the material in Chapter 13 regarding aggression, you may come away with a pessimistic view of human nature and behavior. Chapter 14 provides the opportunity to balance that view with an in-depth look at prosocial behavior. One very striking set of studies covered in this chapter, those related to bystander intervention, allows you to examine your own response to emergencies. It is likely that the coverage of this material will continue to affect the way you respond to emergency situations after you have left this class.