Stanley Takes Us Inside The Millionaire Mind It pays to be different. In The Millionaire Mind, Dr. Thomas J. Stanley shows how self-made millionaires have surmounted shortcomings such as average intelligence by carefully choosing their careers, taking calculated risks, living balanced lifestyles—and maintaining their integrity. Building on his research from the best-selling The Millionaire Next Door, Dr. Thomas J. Stanley delves further into the psyche of the American millionaire with a groundbreaking new study, The Millionaire Mind. Dr. Stanley takes a close look at the top one percent of households in America and tells us what makes them tick. His findings on how they reached their financial success are based on in-depth surveys and interviews with more than 1,300 millionaires.