If you haven’t yet seen Simon Sinek’s TED Talk, now is the time. He has a simple but powerful model for inspirational leadership all starting with a golden circle and the question "Why?" His examples include Apple, Martin Luther King, and the Wright brothers.
Sinek’s interest in anthropology turned his fascination with people into a career of convincing people to do what inspires them. His book Start With Why is a deeper dive into the topics he focuses on in this very inspiring TED Talk.