Abstract

David Lewis and many others hold that the "antecedent-worlds" relevant for the evaluations of most counterfactuals contain violations of the laws of the actual world, or "miracles". But this isn’t necessary. We may think of the counterfactual present "as if" it were the result of an unlawful divergence from actual history, while still extrapolating to a lawful counterfactual past. Not only does this account render miracles unnecessary, it serves as a unified way to evaluate forward and backward counterfactuals