Dianetics: The Evolution of a Science

{{short description|Early book by L. Ron Hubbard}}

{{use mdy dates|date=March 2023}}

{{Infobox book

| name = Dianetics: The Evolution of a Science

| image = Dianetics - The Evolution of a Science.jpg

| image_size =

| caption = Early edition

| author = L. Ron Hubbard

| language = English

| publisher = Hubbard Association of Scientologists International Ltd (1955)

| publisher2 = Bridge Publications (2007)

| release_date = May 1955

| media_type = Print book

| pages =

| isbn = 9781403144188

}}

Dianetics: The Evolution of a Science is a book written by L. Ron Hubbard. Originally published in May 1950 as an article in Astounding Science Fiction, and immediately preceding the publication of his book Dianetics: The Modern Science of Mental Health, it was expanded and republished as a 48-page book in 1955 by Hubbard Association of Scientologists International Ltd.{{r|atack}}Dianetics: The Evolution of a Science (1955) {{OCLC|362924343}} In 2007, it was republished by Bridge Publications as a 213-page book — part of the re-release of the "basic books" of Scientology.Dianetics: The Evolution of a Science (2007) {{isbn|9781403144188}} The book is considered part of Scientology's canon.{{r|rothstein|page=21}}

In Dianetics: The Evolution of a Science, Hubbard describes how he defined the reactive mind and developed the procedures to get rid of it. The book includes Hubbard's account of the reasoning behind his development of Dianetics.{{rp|dust jacket}}