The Mongols

The Mongol Empire, the second largest empire in history. Temujin (aka Genghis Khan) who came from a small tribe and vowed in his youth to bring the world to his feet. He almost did--he united many nomad tribes, destroyed cities to gain more land, and resources, he killed men, women and children, with no remorse, he exploited skills of highly developed tribes in warfare, and most importantly they were clever enough to adopt policies that would "spare technicians, musicians, singers, dancers, artisans, engineers" etc.... all to enrich their lives/culture and able to maintain some sense control and power.

In my opinion the Mongols were brilliant and yet ruthless. I mean how they were able to conquer a world that didn't know its potential, the ability to trade magnificent treasures with other tribes, communites etc. was safe and I think the most significant part of the Mongol Empire was their ability to be open to new ideas. For example, religion. There was no set rules to what belief everyone is should have but the be open. 

Overall, the Mongols is an Empire that should be recognized for their effort to become a super power.