Cause h<span>umans are unique and different from each other.</span>
Rockets ➡ allows for space explorarion
biotechnology ➡ develops vaccinations and genetic treatments
internet ➡ allows for connections around the globe
computers ➡ enables fast calculations
Trade flourished because these progressing empires were developing new ways to produce products and utilize agriculture in their areas, such as Han with silk and Rome with olives and fishing/seafaring. These empires has never had access to goods that were from other areas before the Silk road, causing trade to become immensely popular and relied upon.