George Berkeley (; 12 March 1685<!-- According to 'An Account of the Life of George Berkeley, D. D. Late Bishop of Cloyne in Ireland' by Joseph Stock, published in 1776 (https://www.maths.tcd.ie/~dwilkins/Berkeley/Stock/Life.html), Berkeley was born 12 March 1684, not 1685. This may be an error by Stock, but interesting to note nevertheless. -->14 January 1753) – known as Bishop Berkeley (Bishop of Cloyne of the Anglican Church of Ireland) – was an Anglo-Irish philosopher whose primary achievement was the advancement of a theory he called "immaterialism" (later referred to as "subjective idealism" by others). This theory denies the existence of material substance and instead contends that familiar objects like tables and chairs are ideas perceived by the mind and, as a result, cannot exist without being perceived. Berkeley is also known for his critique of abstraction, an important premise in his argument for immaterialism. Wikipedia
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