In February of 1967, L. Ron Hubbard returned to the Canary Islands to continue his advanced research of an individual's spiritual nature.
On the 18th of March, he flew to Rhodesia, where he investigated the ability of a single individual to single-handedly assist a small country in overcoming its problems. It was there that he discovered OTs work better in numbers and that a solitary OT can be thwarted without the support of other like-minded beings.
In July, he returned to England and delivered the final lectures of the Saint Hill Special Briefing Course.
He released the first advanced levels of Scientology auditing, which took one beyond the State of Clear originally postulated in Dianetics.
On the 1st of September in 1966, L. Ron Hubbard resigned from all directorships and management of Scientology churches.
He subsequently accepted his third Explorers Club flag for the Hubbard Geological Survey Expedition, which found and examined ancient Mediterranean civilizations, amplifying one's knowledge of history. From the results of these expeditions came the book, Mission into Time.
In December, L. Ron Hubbard purchased a small sailboat, The Enchanter, which was later renamed Diana.