Final answer:
The 12th-century Mongols were a nomadic and tribal society skilled in horsemanship and warfare, led by Genghis Khan to eventual conquest. Economically dependent on herding, they were engaged in frequent low-intensity conflicts over resources. Their most significant legacy was the increase in trade and ideas during the Pax Mongolica.
Step-by-step explanation:
Before the Mongols conquered Eurasia in the 13th and 14th centuries, they were a nomadic and tribal society in the 12th century, primarily occupying the steppes north of China. Economically, they were dependent on herding and raiding, with conflicts often arising over resources such as pastures and water. Notably, the Mongols were proficient in horsemanship and warfare, skills vital to their later conquests, and their society was characterized by constant low-level conflicts among themselves.
Genghis Khan was a pivotal figure who unified these feuding clans in 1206 and led them to become an expansive force. The early Mongols did not contribute significantly to technological advances or cultural developments but excelled in military strategy and cavalry tactics. Despite this, their empire facilitated a profound increase in trade and the exchange of ideas during the Pax Mongolica, which was one of their most significant legacies.