Gesture in the social emerged I imagine when we were still four legged and furry. And here I so wish we could claim some part of what is now Aves amongst our closer ancestor. But while still in the womb we do have a vestigial tail, which by the time we are forty days beyond conception completely disappears. The origin of the devil I like to pretend, and I have to say I am glad we are rid of it.
All the same, those early dreams while still wrapped up in embryonic fluid, can become real again. While engaged in my own business a Squirrel flipped his tail at me, in a manner which truly tested authority. Resolution was prompt, however. I have a growl and can throw things. But I reckon if I had a tail, I'd be still doing battle.