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From its ancient roots to its modern application, the practical utility of the Enneagram has been appropriated by the CIA to profile world leaders, written about in The Paris Review, Newsweek, Forbes, and CNN.com, and taught in graduate courses at several academic institutions, including Stanford University. The Enneagram is even used to explain leadership styles and decision making styles in the workplace.
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Christopher L. Heuertz (The Sacred Enneagram: Finding Your Unique Path to Spiritual Growth)