This essay, published in the Twentieth Annual Clifford Symposium, sketches two ways in which Judge Jack Weinstein’s judicial performance raises issues of responsibility. First, it considers how he has deployed responsibility concepts that are central to tort law. Unsurprisingly, it concludes that, in his efforts to do “equity” through mass tort litigation, he has stretched these concepts quite far. This conclusion raises a second set of questions about responsibility — namely, questions about the role responsibilities of federal district court judges. As to these, the essay contends that Judge Weinstein’s tort decisions are consistent with a familiar and plausible account of judicial decision-making. It also notes ways in which he has been especially responsible in his handling of claims and claimants.