For particulars of Collier's history as a nonjuring bishop, see Thomas Lathbury, A History of the Nonjurors .
They were recruited largely, but not solely, from among the Roman Catholics, and the Protestants among them were often identical with the NonJurors.
Under William and Mary he succeeded Tillotson as dean of Canterbury in 1689, and (after declining a choice of sees vacated by nonjurors who were his personal friends) followed Thomas Lamplugh as archbishop of York in 1691.
In 1716, in reply to George Hickes, he published a Preservative against the Principles and Practices of Nonjurors in Church and State, and in the following year preached before the king his famous sermon on the Kingdom of Christ, which was immediately published by royal command.
Thenceforwards the clergy were divided into hostile factions, the Constitutionals and the Nonjurors.