What Makes Us Human?

I heard Melvin Bragg talking in about this subject in an essay of his, that he read out on the radio.
His take on it is that humans have and hold dear and indeed cultivate friendships.
I think he is right.
Animals have companions.Companions that they live with, play with and spend time with but they don't have friendships. Friendships are quintessentially a human phenomenon .
A dear friend of mine has just received some life changing news.
He was stoic, and typically cavalier about the whole thing but did show the real emotions behind the mask of ok-ness when I pushed him gently.
I have known him twenty years or so and I am glad to be able to stand in his corner now, as he would do in mine if the tables were turned.
That's what friends do.
My best friend Nu, picked up on my upset and waded in with some support of her own. It was a brief phone call. I had been washing Mary's " Mary" in the kitchen sink and she was still outside St Paul's basking in the Late afternoon London sunshine , but in a few words I too felt supported at a time of reflection and unhappiness.
That's the strength of the chain of friendship me thinks.
Each link supporting the next.
That's the power of friendship.
And that's what makes us human