A most fascinating book for me. I was involved in a huge cultural change in a very large government bureaucracy. This book helped me understand how to approach the problem of lip service (non-support) from management, even though the stated goal was to make the change. I referred to many concepts in the book at numerous team meetings and tutored companion change agents on how to get the ball rolling toward the tipping point. Strongly recommended if you are involved in any type of change implementation in a large organization.