"A Treatise of the Laws of Nature", originally titled "De Legibus Naturae", first appeared in 1672 as a theoretical response to a range of issues that came together during the late 1660s. It conveyed a conviction that science might offer an effective means of demonstrating both the contents and the obligatory force of the law of nature. At a time when Hobbes's work appeared to suggest that the application of science undermined rather than supported the idea of obligatory natural law, Cumberland's "De Legibus Naturae" provided a scientific explanation of the natural necessity of altruism. Through his argument for a moral obligation to natural law, Cumberland made a critical intervention in the early debate over the role of natural jurisprudence at a moment when the natural law project was widely suspected of heterodoxy and incoherence. This