I've been wondering which Empire in history was the greatest a bit lately, but I've realized that before it can be answeard, you would havce to come up with come criteria to judge with. so far, I've come up with these...
1)Amount of time it took to build the Empire.
2)How much land the Empire controled.
3)The number of people in the Empire.
4)How long the Empire lasted.
5)The military power of the Empire.
6)The economis strength of the Empire
7)The Empire's impact on history.
Also, as a side note, would the number of slaves be important?
Any thoughts, or suggestions to add?