Samuel Johnson was a clergyman, educator, linguist, encyclopedist, historian, and philosopher in colonial America. He was a major proponent of both Anglicanism and the philosophies of William Wollaston and George Berkeley in the colonies, founded and served as the first president of the Anglican King's College, which was renamed Columbia University following the American Revolutionary War, and was a key figure of the American Enlightenment.

George Berkeley – known as Bishop Berkeley – was an Anglo-Irish philosopher whose primary achievement was the advancement of a theory he called "immaterialism". 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.