All of Seth Godin's books are amongst my favourites - sometimes you just resonate with an author. I like the way he speaks his mind and is unafraid to test out new thoughts and ideas.
He explains a tribe is nothing ore than a group of people connected to an idea, a leader and one another. His point is that with the web as it is developing we have more ways to find people of similar ilk and to join the "tribe". However, not all of these groups are fruitful and they need leaders and facilitation in order for them to be productive and constructive. This leadership angle is important.
Seth Godin's thoughts as I connected to them in this book is that being a leader of a tribe is tough and demanding. Often tribal leaders are accused of being outside the norm - a bit of a heretic. He believes that the leaders who are perceived as such and who stick to their views will win out in the end.
What does the author suggest we do to grow these tribal social movements?
1. Publish a manifesto; state who you are and what you are about
2. Others need to find and connect to you - make this as easy as possible
3. Keep the financial stuff in the background
4. Publicly track your movement's momentum and growth
mmm easy on paper though I wonder just how easy it is to do these things.
As good as his books, I also recommend Seth's Blog http://sethgodin.typepad.com/ and you can find out more about him and his books at http://www.sethgodin.com