This Article addresses an increasingly important question: When, if ever, should foreign citizens be included as members of an American class action? The existing consensus holds that courts should exclude from class membership those foreign citizens whose country does not recognize an American class judgment. Our analysis begins by establishing that this consensus is flawed. Rather, to minimize the costs associated with relitigation in a foreign forum, we must distinguish between foreign claimants who are likely to commence a subsequent foreign proceeding from those who are unlikely to do so; distinguishing between those who come from recognizing and nonrecognizing countries creates needless inefficiency. Using standard tools of economic a...