When I wrote The Second Crack I wanted to explore what drives us to help each other – to help our sister or nephew, to help our neighbor, to help a stranger on another continent. And some of the answer may be - because it makes us feel better, more noble. But even more fundamental is that it makes us feel that we are a necessary thread in this tapestry we call life.   That said, how far do we go, how much do we give up for that Afghan girl thirsty for an education or that hungry wounded boy in