| Why People Help | Explanation |
| Kin selection | We are more likely to help those who are close relatives, as it might promote the survival of our genes (Alexander, 1974; Hamilton, 1964). |
| Empathy | We assist others to reduce their distress (Batson & Powell, 2003). |
| Social exchange theory | We help when the benefits of our good deeds outweigh the cost (Thibaut & Kelly, 1959). |
| Reciprocial altruism | We help those who we believe can return the favor in the future (Trivers, 1971). |
| Mood | We tend to help others when our mood is good, but we also help when our spirits are low, knowing that this behavior can improve our mood (Baston & Powell, 2003; Schnall, Roper, & Fessler, 2010). |
| There are many reasons people assist each other in times of need. Above are some common explanations. |