Charles F. Haanel (1866–1949) used the concepts and methods found in The Master Key System to create a successful business career in St. Louis, Missouri, where he eventually founded one of the largest conglomerates of his time. He wrote several bestselling books focusing on his business technique. Besides The Master Key System, he also wrote Mental Chemistry and The New Psychology. Known as the “father of personal development,” Haanel’s commonsense wisdom has revolutionized conventional thought for almost one hundred years. Ruth L. Miller was ordained in the New Thought tradition and became the pastor of the Lifeways Center in Portland, Oregon, then interim assistant at Unity of Beaverton. She is currently serving New Thought and Unitarian-Universalist churches in Oregon, Washington, and California. She earned a doctorate in systems science from Portland State University integrating intuition and analysis in impact assessment and decision-making. Her MS in cybernetic systems from San Jose State University was earned with a thesis integrating intuitive methods in systems planning. Her certificate in environmental studies is from Long Beach State University and a BA in anthropology with a minor in American Literature was earned at the University of New Mexico. For more information, please visit RuthLMillerPhD.com.