When several agents together produce suboptimal outcomes, yet no individual could have made a difference for the better, Act Consequentialism counterintuitively judges that all involved agents act rightly. I address this problem by supplementing Act Consequentialism with a requirement of modal robustness: Agents not only ought to produce best consequences in the actual world, but they also ought to be such that they would act optimally in certain counterfactual scenarios. I interpret this Modally Robust Act Consequentialism as Act Consequentialism plus (...) a requirement of moral virtue, namely, to reliably act rightly and to act rightly for the right reasons. (shrink)