How would we treat our neighbor, if, when I looked at you, or you, or you, and thought "all we have is each other to survive"? 

In the minute of time we share together, it's only you and me. If I pass out, I am most dependent on you. You whom I met just seconds ago. 

We are because we are. I am not independent of anyone.  I am because of those before me, because of those around me, because of you.