John de Ruiter (born November 11, 1959) is a Canadian nondualist author who conducts meetings in Edmonton, Alberta and abroad.
He operates a centre called the "College of Integrated Philosophy." However, the organization cannot legally be considered a college as it is not formally accredited by the Government of Alberta.
De Ruiter conducts his seminars and lectures from the Oasis Centre, a large auditorium venue in west Edmonton also used to host weddings and events.Notably, De Ruiter has been implicated in a number of public controversies, including accusations of being a cult leader by multiple independent news outlets, and a civil lawsuit in which he was sued by two sisters, who alleged he was in a three-way common law marriage with both women simultaneously.
De Ruiter has been accused by former followers of using faith-based claims to coerce them into sexual acts.