Final answer:
The General Agreement on Tariffs and Trade (GATT), which later became the World Trade Organization (WTO), supports small businesses in operating globally by reducing trade barriers.
Step-by-step explanation:
The organization that originated and supports the idea of small businesses operating on a global level is the General Agreement on Tariffs and Trade (GATT). This agreement was signed after World War II and transformed into the World Trade Organization (WTO) in 1995. The purpose of GATT, and eventually the WTO, was to encourage international trade by reducing tariffs and other barriers to trade, facilitating a global marketplace where businesses of all sizes, including small ones, could compete and thrive globally.