Earl Nightingale grew up in California during the Great Depression. Because his family was very poor, Earl educated himself in his local library. His main focus: what makes people turn out the way they do in terms of their wealth, their career achievements, and their happiness. <p/> After beginning his career in the US Marines during World War II, Earl was hired as a radio announcer. He eventually became a popular daily broadcaster for CBS. Through his interest in both personal development and audio, he partnered with Lloyd Conant to form the Nightingale-Conant Corporation. At Nightingale-Conant, he focused on recording the ideas and lessons about success that he studied throughout his life.