For each of the five civilizations you studied in this unit (Han, Gupta, Maya, Aztec, Inca), identify one development that you think is the most significant for each civilization. Then rank those five developments in importance from 1 to 5 (1 most important, 5 least important). While your opinion may play a role in your choice, your rankings should reflect sound reasoning. So, you should base your rankings on specific qualities such as the short- and long-term impact that each development had on other civilizations at the time or the degree of technological advancement and creativity that it demonstrates.