The document outlines William Paley's teleological argument for the existence of God. Paley makes two main arguments:
1) Design qua purpose - The universe functions like a machine with different parts working together for a specific function, implying an intelligent designer like a watch implies a watchmaker.
2) Design qua regularity - The order, laws, and regularity seen in the universe and bodies imply an intelligent designer, just as a formal garden implies a gardener.
However, critics like Hume and Laplace argue this does not prove the Christian God and is a "God of the gaps" argument. Evolution by natural selection is also presented as an alternative to intelligent design.