the first sign of civilization in an ancient culture was a femur (thigh bone)

 A student asked anthropologist Margaret Mead, What do you consider to be the first sign of civilization in culture? 

Students were expected to talk about fishhooks, clay pots, or grinding stones. 
But Mead said that the first sign of civilization in an ancient culture was a femur (thigh bone)

that had been broken for some reason and then healed by healing. 
Mead further explained that in animal life, if you break a leg or get injured, you die. You cannot run away from danger. You cannot go to the river to drink water, and you do not have enough time and resources to wait for your wounds to heal. 
The broken femur (thigh bone) that was treated is evidence that he was supported in the moment. His wounds were bandaged, and he was taken to safety when someone in trouble was seen. He was helped by This was the moment when civilization began. "
When we help others, we are at the best of our civilization.