Simon Sinek is a British-American author, inspirational speaker, and leadership expert best known for popularizing the concept of “Start With Why.” He has written bestselling books including Start With Why, Leaders Eat Last, and The Infinite Game, which focus on leadership, purpose-driven business, and building organizations that inspire trust and long-term success. Through his talks, workshops, and writing, Sinek has influenced leaders worldwide to adopt a vision-centered approach to management and organizational culture.