Rob Bell is one of the most influential of the emergent leaders. He helps to give an insight into how many people view the church, and in turn how we as a church need to be sensitive to those who have no understanding of what the church is supposed to be.
It is important to always be asking questions about our relevancy. In fact it is imperative. So much of what we call the church is actually a cultural construct. Jesus was radical and we need to be also.