idealism in which things only continue to exist when they are perceived. When humans do not perceive objects, they continue to exist because God is perceiving them. Therefore, in order for objects to remain in existence, God must exist omnipresently. David Hume, in the mid-18th century, referred to the teleological argument in his A Treatise of Human Nature. Here, he appears to give his support to the argument from design. John Wright notes that "Indeed, he claims that the whole thrust of his analysis of causality in the Treatise supports the Design argument", and that, according to Hume, "we are obliged 'to infer an infinitely perfect Architect. However, later he was more critical of the argument in his An Enquiry Concerning Human Understanding. This was presented as a dialogue between Hume and "a friend who loves sceptical paradoxes", where the friend gives a version of the argument by saying of its proponents, they "paint in the most magnificent colours the order, beauty, and wise arrangement of the universe; and then ask if such a glorious display of intelligence could come from a random coming together of atoms, or if chance could produce something that the greatest genius can never sufficiently admire". Hume also presented arguments both for and against the teleological argument in his Dialogues Concerning Natural Religion. The character Cleanthes, summarizing the teleological argument, likens the universe to a man-made machine, and concludes by the principle of similar effects and similar causes that it must have a designing intelligence: On the other hand, Hume's sceptic, Philo, is not satisfied with the argument from design. He attempts a number of refutations, including one that arguably foreshadows Darwin's theory, and makes the point that if God resembles a human designer, then assuming divine characteristics such as omnipotence and omniscience is not justified. He goes on to joke that far from being the perfect creation of a perfect designer, this universe may be "only the first rude essay of some infant deity... the object of derision to his superiors". Derham's natural theology Starting in 1696 with his Artificial Clockmaker, William Derham published a stream of teleological books. The best known of these are Physico-Theology (1713); Astro-Theology (1714); and Christo-Theology (1730). Physico-Theology, for example, was explicitly subtitled "A demonstration of the being and attributes of God from his works of creation". A natural theologian, Derham listed scientific observations of the many variations in