What is the origin of the concept of a law of nature? How much does it owe to theology and metaphysics? To what extent do the laws of nature permit contingency? Are there exceptions to the laws of nature? Is it possible to give a reductive analysis of lawhood, or is it a primitive? Twelve new essays by an international team of leading philosophers take up these and other central questions on the laws of nature, whilst also examining some of the most important intuitions and assumptions that have guided the debate over laws of nature since the concepts invention in the seventeenth century. Laws of Nature spans the history of philosophy and of science, contemporary metaphysics, and contemporary philosophy of science.