Transjudicialism is a phenomenon where precedents derived beyond a particular venue, such as global, regional, and national courts, serve as legal rationale within sovereign jurisdictions. Transjudicialism is part of a broader trend towards judicial globalization where legal discourses transcend national jurisdictions and supra-national bodies render binding and non-binding decisions. This article sketches the broad contours of a nascent global legal system to demonstrate how judicial discourse has increasingly become globally oriented. I focus on transjudicialism as an example of that phenomenon, specifically, how it has occurred among appellate courts in the U.S. and in other nations. I suggest that the circumstances of judicial globalization illustrate at least one way that people are multicitizens, or those who have rights and responsibilities with regard to various publics from local to global. I argue that teaching about and for multicitizenship in social studies should draw on well-developed practices of democratic citizenship education, including inquiry and deliberation, along with an under-attended area in the field, that of forecasting, or future study. (Contains 3 notes.)