You should look at the Bonobos another close relative of ours which fully acts altruisticly and in many ways that you may find "interesting"

From The Sunday Times: "Chimps beat us to that human touch" http://www.timesonline.co.uk/tol/news/world/europe/article1977658.ece

"We thought we were very different from other animals including our primate relatives, but this is not the case. At least some altruism may have been present in the common ancestor to humans and chimpanzees,” said Felix Warneken, a psychologist at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, who led the research."