Here is a great presentation by Simon Sinek, a great author and marketer. He gives some very nice examples to explain how leaders inspire actions.
As we regularly insist on the purpose of the brands, Simon redefines the “why” does your company exist? Like Apple or the Wrigth brothers in the beginning of the century, they succeed as long as they try to reach a global objective, not only make money (which is actually a side effect). It perfectly responds to Marc Pritchard‘s conferences.
Here is the video :