What makes us humans?
I have heard "Art is what makes us human" "humans are the only animals that laugh" and similar proverbs. Today after a long lunch with a lovely friend I ended up thinking that friendship make us human.
In purely animalistic /materialistic terms, there is no need for the existence of friendship. Workmates are necessary: we need to cooperate in order to survive. Families are necessary: we live with other people to make the most of the resources. Love is a glorification of the sex drive. But... friendship? there is no cooperation-in-order-to-survive and no sex involved. So, in animal terms, there isn't much of a point.
Do animals have friends? I don't think so. For that to be possible, a couple of animals wouldn't need to cooperate in order to obtain food. Gregarious birds, or a pack of wolves, even without blood ties, are not friends but workmates, because the essence of friendship is the fact that it is not necessary. Like Art and laughter....