The main issue is the idea that evolution only rewards competition and doesn't value cooperation.
This isn't true, and a simple example can prove it... jackdaws vs seagulls in Cornwall... the jackdaws are much smaller than the seagulls, but the seagulls won't challenge them for food because the jackdaws always go around in pairs; one keeps a look out while the other is feeding. Cooperation.

There are other examples. The honeybird has been known to alert humans to the presence of a beehive, the humans will extract the honey from it, and leave some for the bird. Cooperation.

Dogs and humans. Bees and flowers. Cooperation in nature is everywhere.