Werner Hans Erhard (born John Paul Rosenberg; September 5, 1935) is an American author and lecturer known for founding est (offered from 1971 to 1984). In 1985, Erhard replaced the est Training with a newly designed program, the Forum. Since 1991, the Forum has been kept up to date and offered by Landmark Education. He has written, lectured, and taught on self-improvement. In 1977, he co-founded The Hunger Project, an NGO. In 1991, he retired from business and sold his existing intellectual property to his employees, who then adopted the name Landmark Education, renamed Landmark Worldwide in 2013.

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