Lucretius' account of the origin of life, the origin of species, and human prehistory (first century BC) is the longest and most detailed account extant from the ancient world. It is a mechanistic theory that does away with the need for any divine design, and has been seen as a forerunner of Darwin's theory of evolution. This commentary seeks to locate Lucretius in both the ancient and modern contexts. The recent revival of creationism makes this study particularly relevant to contemporary debate, and indeed, many of the central questions posed by creationists are those Lucretius attempts to answer.