Start with Why: How Great Leaders Inspire Everyone to Take Action” by Simon Sinek is a thought-provoking book that explores the concept of the Golden Circle and its impact on leadership and decision-making. Published in 2009, the book has garnered widespread acclaim for its profound insights into why some leaders and organizations are more successful and influential than others. Sinek’s central thesis is that truly inspiring leaders and companies start with “why” — their purpose, cause, or belief — before moving on to “how” they do what they do and “what” they offer. This summary delves into the key ideas and principles presented in “Start with Why.