A Treatise Concerning the Principles of Human Knowledge

"A Treatise Concerning the Principles of Human Knowledge" is a 1710 work by the Irish Empiricist philosopher George Berkeley. In this exceptional work George Berkeley makes the striking claim that physical things consist of nothing but ideas and therefore do not exist outside the mind. This claim establishes him as the founder of the idealist tradition in philosophy. "A Treatise Concerning the Principles of Human Knowledge" largely seeks to refute the claims made by his contemporary John Locke about the nature of human perception. Whilst, like all the Empiricist philosophers, both Locke and George Berkeley agreed that there was an outside world, and it was this world which caused the ideas one has within one's mind; George Berkeley sought to prove that outside world was also composed solely of ideas.