No tural rights theory justi⥳ strong intellectual property rights.More speci⣡lly, no theory within the entire domain of tural rights thinking ^ encompassing classical liberalism, libertarianism and left-libertarianism, in all their innumerable variants ^ coherently supports strengthening current intellectual property rights. Despite their many important diᥲences, all these tural rights theories endorse some set ofmembers of a common family of basic ethical precepts. These commitments include non-interference, fairness, non-worsening, consistency, universalisability, prior consent, self-ownership, self-governce, and the establishment of zones of autonomy. Such commitments have clear applications pertaining to the use and ownership of created ideas. I argue that each of these commitments require intellectual property rights to be substantially limited in scope, strength and duration. In this way the core mechanisms of tural rights thinking ensure a robust public domain and categorically rule out strong intellectual property rights.