DEMAND AND SUPPLY
We need each other to do things that we can't do for ourselves.If we are intimately connected with each other,if we don't know each other we find another way to handle it,if you think about it ,each according to his a or her abilities and each according to his or her needs is sort of the same things as supply and demand,
Yes we complement each other, what you dont have I have and we try to blend it into each other, even in relationships it is like that
Yup,it is great not by one but many .thanks for reading
You are welcome