Survival of the fittest doesn't disclude benevolence to the social group, but in point of fact, is encouraged. Evil can be distilled as purely good for the singular entity, while good is how it effects the group as a whole. (This discludes actions of people with a brain deceases.) If one robs a bank and gets away with the money, its a real good thing for the individual, but is poor for the macro group.

The more evil something is, the less beneficial for the group. The greater the good the converse is true. This doesn't prove the breath of God, but proves survival is at the core of every living thing. The more complex the creature, the more abstract survival behaviors are.

Fish school, wolfs have packs, whales have pods, people have families, cities and countries. All are mechanisms for group prosperity.