Before revision: The concept of metasystem transition was introduced by the cybernetician Valentin Turchin in his 1970 book " The Phenomenon of Science, " and developed among others by Francis Heylighen in the Principia Cybernetica Project.
After revision: The concept of metasystem transition was introduced by the cybernetician Valentin Turchin in his 1970 book The Phenomenon of Science, and developed among others by Francis Heylighen in the Principia Cybernetica Project.