Sinek provides a nice overview of how successful leaders start with why their organizatioin does what it does. If that's not clearly known and expressed often, then the organization will falter and ultimately fail as the employees and customers will lose track of the ultimate goal. Sinek chronicles a number of examples of successes, like Apple, and failures, like Microsoft.
I enjoyed reading the book and found it thought-provoking to not only determine the why for where I work but also the why in my personal life. Starting with why is a very good way to determine whether you are heading in the right direction in everything you do.
While I do think that the what and how that a company or individual accomplishes their why is important, which is often overlooked throughout the book, starting with why is beneficial. If you want to find a way to get your company, non-profit, or yourself out of a rut, then this book might be just what you need to ask why and solve the problem.
Ph.D. Economist at the Texas Public Policy Foundation. Blog posts are publications by the author.