@Decima: Thats what the movies like to play out, but in reality the Mongols were one of the most secular and trade oriented nations of the era.
Yes they did a lot of pillaging and killing to become a massive nation, but life under Mongol rule was actually better then the governments prior to that and in some cases the governments that succeeded the Mongolians.
So long as you submitted and surrendered to the Mongols you were fine. If you tried any resistance however you would be killed, your wives raped and children enslaved.
But most historical reports showed that under the mongols trade went up and crime went down, which are two rather positive traits for a civilization.
It was under the Kublia Khan (Genghis Khans grandson) that trade between China and Europe resumed for the first time in around 1500 years.
Unfortunately the Mongol influence in the world was less significant then we normally credit them because of fighting between Mongol generals.
Macedon and Mongolia are quite similar in terms of their sudden rise and sudden fall, however Mongolia conquered more and was able to remain large for longer. They were also more secular and pro-trade, for that reason I consider Mongolia and not Macedon as one of the greatest empires in history.
@G-Man: Greece is mostly famous for its philosophers, but the philosophers we love were executed for what they thought because of how controversial it was, Socrates was hardly a product of Greek culture and freedoms given how his life ended, even if the following generation of Greeks loved him.
That said Alexander was a monarch who was groomed from birth to be a conqueror. He was a product of the Macedonian monarchy and both Rome and Greece showed us that at the time, monarchy was far superior to democracy.
@Lakersfan: It was as Alcuin put it, the trade happened under the Yuan Dynasty. However most historians consider Yuan to be Mongol not Chinese given that the dynasty was founded by Kublia Khan and was entirely Mongolian in heritage, they just happened to have a capital inside modern China's borders and most of their empire covered modern day China.
The Ming Dynasty carried on this trade for a bit, but the isolationist policies from Ming rulers in the 15th century put this trade at an end. The Ming were a powerful empire, but its power was entirely owed to the trade, development and stability brought by the Mongols that ruled right before it.
A case can be made for the silk road under the Han Dynasty, but for the most part the silk road was between India and Europe given the isolationist culture China had since Confucius.
In anycase, if Halt wants to claim that the Chinese Empire is the greatest empire in history, he really needs to clarify which dynasty he is talking about.
I am not a fan of Ming or Qing and have mixed feeling towards Han. I personally don't know enough about Tang or the dynasties preceding Huang to comment on them.