1680 – 1732
Arthur Collier was an English clergyman and philosopher best known for his idealist metaphysics, which denied the existence of an external material world. His 1713 work Clavis Universalis argued, independently of Berkeley, that matter is a contradictory notion and that reality is fundamentally mental.
Authored Clavis Universalis (1713), a systematic defense of immaterialism
Developed an idealist metaphysics independently of and parallel to George Berkeley
Argued that the notion of an external material world is logically incoherent
Contributed to early modern debates on the nature of perception and substance
Served as rector of Langford Magna while pursuing philosophical theology