The mature expression of Bohm's views in the psychological field was presented in a seminar conducted in 1990 at the Oak Grove School, founded by Krishnamurti in Ojai, California. It was one of a series of seminars held by Bohm at Oak Grove School, and it was published as "Thought as a System". In the seminar, Bohm described the pervasive influence of thought throughout society, including the many erroneous assumptions about the nature of thought and its effects in daily life.