> Humans don’t have that. I can cooperate with you guys. One of you is a Serbian. The other one is a Persian by origin. And I’m Indian by origin. We have very little blood in common, basically none. But we still cooperate.

I'm not a geneticist and I'm having trouble conjuring the right search terms to find a source, but I seem to recall reading not too long ago that all humans are more related to each other on average than members of most other species, because we very "recently" (still millions of years) went through a near-extinction event, making our gene pool less diverse than most other species because everybody alive today comes from the few people that survived that event. So altruism in most animals is actually more impressive than altruism in humans.