I think one of the great primordial fears we have once we become conscious of our aloneness as children is the fear of losing our mother. We have that from the moment we realize we can lose her just in the supermarket. As a child, it was more terrifying than arithmetic.
There are these very poor communities on the outskirts of Cairo called Mokattam, where a lot of the garbage collectors live. I used to volunteer there, doing health and education work when I was younger and living in Egypt.