Dialogues Concerning Natural Religion is a philosophical work by the Scottish philosopher David Hume, first published in 1779. Through dialogue, three philosophers named Demea, Philo, and Cleanthes debate the nature of God's existence. Whether or not these names reference specific philosophers, ancient or otherwise, remains a topic of scholarly dispute. While all three agree that a god exists, they differ sharply in opinion on God's nature or attributes and how, or if, humankind can come to knowledge of a deity.

In the Dialogues, Hume's characters debate a number of arguments for the existence of God, and arguments whose proponents believe through which we may come to know the nature of God. Such topics debated include the argument from design—for which Hume uses a house as an analogy—and whether there is more suffering or good in the world (argument from evil).^[1]

Hume started writing the Dialogues in 1750 but did not complete them until 1776, shortly before his death. They are based partly on Cicero's De Natura Deorum. The Dialogues were published posthumously in 1779, originally with neither the author's nor the publisher's name.^[2]

In The Blind Watchmaker (1986), evolutionary biologist Richard Dawkins discussed his choice to title his book after theologian William Paley's famous statement of the teleological argument, the watchmaker analogy, and noted that Hume's critique of the argument from design as an explanation of design in nature was the initial criticism that would ultimately be answered by Charles Darwin in On the Origin of Species (1859).^[3] In the second part of the Dialogues (1779), the character Philo observes that animal reproduction appears to be more responsible for the intricacies and order of animal bodies rather than intelligent design, stating:

But were we ever so much assured, that a thought and reason, resembling the human, were to be found throughout the whole universe, and were its activity elsewhere vastly greater and more commanding than it appears in this globe; yet I cannot see, why the operations of a world constituted, arranged, adjusted, can with any propriety be extended to a world which is in its embryo state, and is advancing towards that constitution and arrangement. By observation, we know somewhat of the economy, action, and nourishment of a finished animal; but we must transfer with great caution that observation to the growth of a foetus in the womb, and still more to the formation of an animalcule in the loins of its male parent. Nature, we find, even from our limited experience, possesses an infinite number of springs and principles, which incessantly discover themselves on every change of her position and situation.^[4]