Since the early editions of the Great Exhibition of Industries of All Nations, such as the famous one held in London in 1851, the main goal of every Expo has been to give nations, politics, the business world, and society a shared space in which to discuss and cooperate in a crucial area of interest common to all the participating parties. 1 Topical themes and subjects are discussed during each edition of Expo. For example, in the earlier editions, the main subjects were related to technology, as the industrial revolution and colonialism were the topical subjects of that period. Later on, even after World War II, human progress and international dialogue have taken centre stage at every Expo, in addition to technology. 2