Originally Posted by Kamazar
Ghengis Khan, you mean? That'd be the Mongols. Why is everyone voting the Roman Empire? They didn't give us architecture, philosophy, or all that much literature. Meh, personal opinion. I guess I'll have to respect it.
True, but it was one of the largest and the longest-lasting empire in the history of the world. For the people back then Rome ruled the entire civilized world. It may have not made huge scientific or cultural advances but the order it brought to the world in its time is Nothing like we have today. After the Roman empire fell it plunged the world into the dark ages because it was so vital to the world. Also, the byzantine empire which was the remnant of the Eastern Roman Empire stood until 1453, the date which many historian's consider the end of the medieval ages.
My point is, though it may not effect today's world a whole lot it completely dominated the era it existed in. And that is why it's the greatest empire ever to exist.