Although there are many animals who attack and kill each other, there are also many who try to protect and care for each other. It's always so interesting when you see animals caring for each other in their natural habitats. Humans have always been taught that animals don't really have feelings or show emotion, but judging from some things I've seen among groups of certain animals, that doesn't appear to be true.
Some animals care way more for each other than human beings care for other members of their own species. So, humans can definitely learn a lot from some of these animals.