Every one, in any culture I can think of, is familiar with the bond of a parent and a child. When a child suffers it is clearly reflected in the face and demeanor of their parents. But does this work on a greater culture?
How does it affect you when your neighbor loses his wife? Or the dog down the street, who happily greeted you on his morning walks, is gone? Do you notice any sadness for yourself?
And so, when a new baby comes home down the street, are you happy?
When the flowers bloom in early spring, or the autumn sky is a particular bright blue, and the physical world seems well, do you notice a rise in your happiness? When a small town in a remote part of the world celebrates 700 years of existence, do you celebrate? Does it raise your spirits?
Because we are the human race, and we all live on and need this planet, we matter to one another. "While no one can guarantee that anyone else can be happy, their chances of survival and happiness can be improved. And with theirs, yours will be." L. Ron Hubbard.