We tend to become social core groups, whatever our similar interest and background where we came through. It tends to be a filter through which people see themselves. It can be all different ethnicities. They can see themselves as San Franciscans, or Warriors fans. You want to build a tribe of viral advocates for that team.

Well, the idea is that failure is an inevitable partner on the road to success and, if you're not willing to confront failure, you can never find out how good you are.

Tribalism isn't a bad thing. If you're a Facebook user, or Twitter user or Foursquare user or LinkedIn user, those are all tribes... and they may even have sub-tribes. It's not pejorative, it's declarative.

Peter Guber Quotes