I picked this book because I was curious about our first billionaire journey and how he made his fortune. I am a big fan of biographies where I can learn more about people in general. This book provides a comprehensive and balanced look at the life of the Standard Oil founder, exploring his ruthless business practices as a "robber baron" and his extensive philanthropy, while also revealing his complex personal life, family scandals, and deep religious convictions. The book is praised for its detailed research, drawing on unprecedented access to Rockefeller's private papers, and for presenting a nuanced portrait of a contradictory figure. From a bookkeeper who made .35 per hour to create the very first major business "trust" in the US, I learned so much about him. I also learned that the Supreme Court broke up Standard Oil in 1911, and it splintered into 34 independent firms, including ExxonMobil and Chevron. Now, I look at Exxon and Chevron with a different perspective. This is the main reason why I love reading biographies. I highly recommend this book to anyone who wants to know about our first billionaire.