John Jackson's long, fruitful association with the General Agreement on Tariffs and Trade (GATT) was unique in the annals of international organizations. His 1969 book, World Trade and the Law of GATT, became the Baedeker for government officials, practitioners, and academics seeking an overall understanding of the trading system or an explanation of a particular GATT provision. Yet the uniqueness of Jackson's relationship to the GATT was not just his foundational scholarship; every international organization in the twentieth century spawned a scholarly community. The uniqueness came from his role as a teacher attracting graduate law students from around the world who traveled to Ann Arbor to study with him and then returned to their countries to take on leadership roles in international trade. These decades of students inspired by Jackson and educated by his synoptic understanding of trade law enhanced Jackson's influence on the GATT in a way that has no parallel in other agencies.