George Berkeley

George Berkeley, Bishop of Cloyne, was an influential Irish philosopher whose primary philosophical achievement is the advancement of a theory he called 'immaterialism'. His most widely-read works are A Treatise Concerning the Principles of Human Knowledge (1710) and Three Dialogues between Hylas and Philonous (1713). In 1734 he published The Analyst, a critique of the foundations of calculus, which was influential in the development of mathematics.