“Dianetics: The Modern Science of Mental Health” was first published by L. Ron Hubbard in 1950. It is a canonical text of Scientology, often referred to as “Book One” of the Scientological holy books. One of the best-selling self-help books in American history, it is also one of the most widely reviled, as the Church of Scientology, like all churches, does not lack for enemies.
“Dianetics” itself is a mixture of biology and psychology, none of it more recent than 1949, and most of it soundly debunked – in some cases, even before the book was written. In particular, the book is frequently criticised for its lack of either qualifiers to its claims or evidence to support them.
No doubt all these critics are merely dupes of Xenu and his thetans.
U.S. Forces — Midnight Oil