It comes from the fact, in western (European) cultures and mythology primarily, that a silver bullet is the one thing needed to kill supernatural creatures, mainly werewolves. From that it grew into a way of speaking about a simple solution to difficult or intractable problems. E.g. "I may have a silver bullet for this problem."

Although I understand and really identify with the idea of a tribe ... I remember from a podcast somebody, I believe Seth Godin, talking about finding the smallest number of people that you can have a positive impact on. I have yet to find that tribe, although I have a good idea of where to start looking.

I feel I'm not ready to blog (and I'm sure I'm not alone) ... but as I heard somewhere ... the best way to done is through begin.