Chimpanzees are some incredible animals. They are different than others in the sense that they truly work in packs. While they are not the only animal to work in packs, they do it to an extent that is just a little bit more than other species. Chimps are not selfish at all and it shows in their day to day lives. They react quicker in ways to cooperate and as a result, they live their lives much less selflessly.
"The chimpanzee could give a partner an object that was out of reach. Individual chimpanzees that were more likely to lend a hand were also the fastest to respond to their partner's problem. In general, this supports situations in which cooperative individuals tend to make prosocial choices faster than selfish people."