Mary Ann MacClean

Mary Ann MacLean (20 November 1931 – 14 November 2005) was a Scottish occultist who was co-founder of the Process Church of the Final Judgement.

Early life MacLean, who was born in Glasgow, Scotland, Among Scientologists, she met Robert Moor, later renamed by MacLean as Robert de Grimston. They married in 1964, created their version of Scientology auditing called Compulsions Analysis. The next year they introduced the cult, The Process Church of The Final Judgment, to a small group of friends and like-minded people.

In 1974, MacLean overpowered her husband by excluding him from his own church. Robert de Grimston disappeared into the United States while Mary Ann MacLean tried to further develop a cult organisation, relocating the group to Arizona and renaming it The Foundation - Church of the Millennium. The church group relocated in 1984, with animals they had at their Arizona ranch, to property it purchased in Kanab. Then, in 1991, The Process Church of The Final Judgment was dissolved and the church renamed Best Friends Animal Society, on the group's Kanab, Utah, property. MacLean continued to engage, with a low profile, in spiritual and political life in Utah. In 2005, MacLean died, and the management of her charity was left to her second husband, Gabriel De Peyer, a former Foundation Faith of God Church member and co-founder of Best Friends Animal Society.