Who was Ghengis Khan and how was he able to have "a fifth of the world at its knees"?

Genghis Khan was a Mongolian warrior and ruler who lived from 1162 to 1227. He is best known for founding the Mongol Empire, which became the largest contiguous empire in history. Born as Temujin, Genghis Khan united the various Mongol tribes under his leadership and implemented military strategies that allowed him to conquer vast territories in Asia and Europe.

Genghis Khan's ability to bring a significant portion of the world under his control can be attributed to several factors:

1. Brilliant military strategies: He developed innovative and effective military tactics, such as superior cavalry warfare, mass mobilization, and adaptability to different terrains. His army was highly disciplined and skilled, enabling them to defeat larger and better-equipped armies.

2. Organization and centralization: Genghis Khan implemented administrative reforms within his empire. He established a unified command structure, efficient communication networks, and a merit-based system that rewarded talent over birthright. This allowed for effective governance and the smooth administration of his vast territories.

3. Psychological warfare: Genghis Khan's reputation for ruthlessness and brutality spread throughout the regions he conquered. This instilled fear in his enemies, causing some cities to surrender without resistance. He used terror as a psychological weapon, which further facilitated his conquests and reduced opposition.

4. Diplomacy and alliances: Genghis Khan was adept at forming strategic alliances with various tribes and nations. These alliances helped him secure support, resources, and intelligence, enabling him to expand his empire further.

5. Infrastructure development: Genghis Khan invested in infrastructure, including trade routes, roads, and postal relay stations. This facilitated communication, trade, and the movement of his armies, enabling him to rapidly respond to any threats or opportunities.

6. Tolerance and integration: Genghis Khan was known for his policy of religious and cultural tolerance. He integrated conquered peoples into his administration and military, allowing them to retain their own customs and beliefs. This minimized resistance and fostered unity within his diverse empire.

By combining military prowess, effective leadership, and innovative tactics, Genghis Khan was able to conquer vast territories and establish an empire that spanned from Asia to Europe, earning him the title of one of history's greatest conquerors.