George Berkeley (1685 – 1753) was an Irish philosopher and Church of Ireland bishop. He was born in Dysart Castle, Thomastown, County Kilkenny. Graduating from Trinity College Dublin in 1707. His most notable contribution to philosophy is his advance of the metaphysical doctrine of subjective idealism which argues against the existence of material things. Berkeley played a key role in the development of Western Philosophy. His works would go on to influence Arthur Schopenhaur, Alfred Whitehead, John Locke, David Hume, and subsequently Immanuel Kant.