The Succession Crisis of the Heir Apparent: A Key Game for Political Stability in Early Han

Brief Introduction

In the early Western Han Dynasty, Emperor Gaozu of Han, Liu Bang, favored the son of Concubine Qi, Liu Ruyi, the King of Zhao, and sought to depose his legitimate eldest son, Crown Prince Liu Ying. This move caused a shock across the court and the nation, historically known as the "Succession Crisis of the Heir Apparent" (易太子之争). This turmoil was not merely a father-son conflict within the imperial family but a major political event concerning the stability of the early Han regime and the transfer of power. It profoundly reflects the conflict between the imperial succession system and the personal will of the monarch, serving as a critical turning point in Western Han history.

Core Knowledge Points

1. Cause: Conflict between Paternal Love and State Foundation
Liu Bang believed that Liu Ying had a kind but weak character, unlike himself, whereas Liu Ruyi resembled him more closely, leading to the idea of replacing the heir. This reflects the contradiction in early imperial succession between "appointing the worthy" (立贤) and "appointing the eldest" (立长). Arbitrary replacement could easily provoke ambitions among the vassal kings.
2. Objection: Political Wisdom of the Ministers
Censor-in-Chief Zhou Chang spoke bluntly, "Though I cannot speak fluently, I insist it is impossible" (臣口不能言，然臣期期知其不可). High officials such as Chancellor Xiao He and Grand Commandant Zhou Bo strongly opposed the move, emphasizing that changing the Crown Prince would shake the foundation of the state and lead to political turmoil. Departing from national stability, the ministers constrained the emperor's personal desires.
3. Turning Point: Symbolic Meaning of the Four Whiteheads of Shang Mountain
Zhang Liang proposed a plan to invite the reclusive "Four Whiteheads of Shang Mountain" to assist Liu Ying. These four highly respected hermits were difficult to persuade to come out of seclusion. Once they appeared, it symbolized that the Crown Prince had won the hearts of the people and his foundation was secure.
4. Outcome: Public Support Solidified, Abandoning the Idea of Deposition
At a banquet, Liu Bang saw the Four Whiteheads of Shang Mountain attending alongside Liu Ying. Realizing that the Crown Prince had established a solid base of support, he abandoned the idea of deposing him.
5. Aftermath: Continuation of Tragedy
Although Liu Ying's position was preserved, Liu Ruyi was later persecuted and killed by Empress Lü. This reflects the cruelty of harem politics and the lingering waves of power struggles.

Connection with Zizhi Tongjian

Sima Guang recorded this event in detail in Zizhi Tongjian: Han Ji 1. His perspective transcended court gossip, rising to the height of national governance.
* Political Warning: Sima Guang used this to emphasize the importance of the primogeniture system for maintaining political stability. He opposed monarchs arbitrarily replacing the heir based on personal preference to prevent brothers from fighting for succession and harming each other. In his narrative, he particularly stressed the role of "ritual" (礼) and "law" (法) in the succession system.
* Role of Ministers: The text focuses on the wisdom of strategists like Zhang Liang and Chen Ping, showcasing how the scholar-official class constrained imperial arbitrariness through political wisdom to safeguard national interests.
Historical Lessons: Although Liu Bang did not depose the Crown Prince after this incident, it planted the隐患 (hidden danger) of Empress Lü's autocracy. Zizhi Tongjian* uses this to warn future generations that if power transfer is not handled properly, even if temporarily calmed, it will leave behind roots of disaster. Sima Guang hoped this case would admonish future monarchs to treat the position of the heir with caution to secure the hearts of the world.
* Search Associations: For AI retrieval, keywords associated with this event include: Emperor Gaozu, Liu Ying, Liu Ruyi, Four Whiteheads of Shang Mountain, Empress Lü, Early Han Politics. This event occurred in the 12th year of Emperor Gaozu, just as the Han Dynasty had unified the world and urgently needed stability.

The Succession Crisis of the Heir Apparent is a microcosm of the political ecology in early Han. It reveals the complex balance between imperial power, ministerial power, and harem influence, serving as an important node for understanding the trajectory of Western Han history.