Laws of nature are said to support counterfactuals. If I were to drop my cup of coffee, it would fall on the floor because (at least partially) of the law of gravitation (i.e., masses attract each other with the inverse square of their distance). By comparison, some random accidental truths cannot support corresponding counterfactuals. Hence, there seems to be prima facie some sort of explanatory interplay between laws and their supporting role in counterfactual reasoning. However, in the stability theory account of laws (developed independently by Lange, Woodward, and Roberts) the usual explanatory direction is turned on its head: a regularity is a law of nature in virtue of being stable (modally hyperresilient) under all (eligible) counterfactual circumstances. Within Lange’s subjunctive stability theory, the counterfactual stability is grounding both the presumed nomicity and necessity of the laws (and not vice-versa). In Woodwards version the modal, counterfactual stability is further grounded in the capacities and dispositions manifested by particular systems. |