George Berkeley also known as Bishop Berkeley was an 18th century philosopher.His theory of immaterialism was later referred to as subjective idealism.This theo... » 

George Berkeley also known as Bishop Berkeley was an 18th century philosopher.His theory of immaterialism was later referred to as subjective idealism.This theory summed up in his dictum Esse est percipi which states thatindividuals can only directly know sensation and ideas of objects notabstractions such as matter. Berkeley wrote A Treatise Concerning thePrinciples of Human Knowledge 1710 and Three Dialogues between Hylas andPhilonous 1713. «