 One may also object to either sort of relative identity account being the historical doctrine on the grounds that only those conversant in the logic of the last 120 years or so have ever had a concept of relative identity. But this may be disputed; Anscombe and Geach (1961, 118) argue that Aquinas should be interpreted along these lines, Richard Cartwright (1987, 193) claims to find the idea of relative identity in the works of Anselm and in the Eleventh Council of Toledo (675 C.E.), and Jeffrey Brower (2006) finds a similar account in the works of Peter Abelard. (On Aquinas, see the supplementary document on the history of trinitarian doctrines  section 4.)  Christopher Hughes Conn (2019) argues that Anselm was the first to consciously develop a Trinity theory involving relative identity.