Daniel Wilf-Townsend (Georgetown U Law Center) has posted “Artificial Intelligence and Aggregate Litigation” (103 Wash. U. L. Rev. __ (forthcoming 2026)) on SSRN. Here is the abstract:
The era of AI litigation has begun, and it is already clear that the class action will have a distinctive role to play. AI-powered tools are often valuable because they can be deployed at scale. And the harms they cause often exist at scale as well, pointing to the class action as a key device for resolving the correspondingly numerous potential legal claims. This article presents the first general account of the complex interplay between aggregation and artificial intelligence.
First, the article identifies a pair of effects that the use of AI tools is likely to have on the availability of class actions to pursue legal claims. While the use of increased automation by defendants will tend to militate in favor of class certification, the increased individualization enabled by AI tools will cut against it. These effects, in turn, will be strongly influenced by the substantive laws governing AI tools—especially by whether liability attaches “upstream” or “downstream” in a given course of conduct, and by the kinds of causal showings that must be made to establish liability.
After identifying these influences, the article flips the usual script and describes how, rather than merely being a vehicle for enforcing substantive law, aggregation could actually enable new types of liability regimes. AI tools can create harms that are only demonstrable at the level of an affected group, which is likely to frustrate traditional individual claims. Aggregation creates opportunities to prove harm and assign remedies at the group level, providing a path to address this difficult problem. Policymakers hoping for fair and effective regulations should therefore attend to procedure, and aggregation in particular, as they write the substantive laws governing AI use.