Werner Erhard is an American author and lecturer best known for founding the personal development program called est (Erhard Seminars Training) in the 1970s. His work focused on self-improvement and transformation, emphasizing personal responsibility and the power of choice. Erhard's teachings have influenced various fields, including psychology and business, and he has been a controversial figure due to his unconventional methods and the impact of his programs. He later developed the Forum, a more modern version of his original training, which continues to be offered today.