- Hill was recruited by William Jacobs and successfully developed a new self-help course and series of lectures for students and to attract investment from prosperous companies in the north.
- America's entry into World War II made Hill's success short-lived as students went off to war and because of paper rations.
- However, RG LeTourneau credited his success with what he learned from "Think and Grow Rich". Hill was recruited to train LeTourneau's plant managers which led to the companies turnaround success.
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