New recent on the behavior of chimpanzees demonstrates that our closest living relatives do in fact display altruistic behavior. Previously, primatologists believed that chimpanzees solely demonstrated behavior for self-serving ends. However, recent behavioral models have shown that the great apes take into account the feelings and needs of others in the group.
“All studies with wild chimpanzees have amply documented that they share meat and other food abundantly, that they help one another in highly risky situations, like when facing predators or neighboring communities, and adopt needing orphans.” — Christopher Boesche to Discovery News.
These findings also shed an interesting light on the existence and development of altruistic behaviors amongst humans and the role it played in our evolutionary and social progression. To learn more about these findings and the future of these research models, see this article in Discovery News or at MSNBC.