Why was a Joseon Crown Prince never truly safe? Explore deadly succession struggles, rival brothers, royal fathers, and the real history behind K-Drama palace intrigue.
Joseon Crown Prince: Why Was the Future King in So Much Danger?
If you watch historical K-Dramas, you have probably noticed that the crown prince always seems to be in danger. Someone might try to poison his food, the queen and royal concubines may compete to put their own sons on the throne, and sometimes even the king begins to distrust his own son.
But shouldn’t the future king be one of the safest people in the kingdom? Why was his life often so uncertain?
During the Joseon Dynasty (1392–1897), the crown prince was the official heir to the throne. However, as long as his father was alive, the king remained the ultimate authority. Even an aging king was not necessarily willing to hand over power to his son. If the crown prince gained too much political influence, he could become a source of tension within the royal court.
There is a Korean saying that captures this situation: “There cannot be two kings under one sky.”
Whenever I read about Joseon history, this saying comes to mind. I find it frightening that even a father and son could become suspicious of each other when royal power was at stake.
Of course, these struggles were not unique to Korea. European royal families also experienced wars, betrayals, and conspiracies over succession. Sometimes, the greatest threat to a prince came not from an enemy kingdom, but from his own family.
Joseon Crown Prince and the Strife of Princes: When Brothers Became Enemies
Two violent struggles during the early Joseon Dynasty show just how dangerous royal succession could become.
King Taejo, the founder of Joseon, had several sons. Instead of choosing his eldest son, he named the young Yi Bang-seok as crown prince. Yi Bang-seok was a son of Queen Sindeok, Taejo’s second wife.
However, this decision angered some of Taejo’s older sons from his first marriage, especially Yi Bang-won, who had played an important role in establishing the dynasty.
In 1398, Yi Bang-won launched what became known as the First Strife of Princes, a violent struggle over royal succession. During the conflict, Crown Prince Yi Bang-seok, his older brother Yi Bang-beon, and the influential founding official Jeong Do-jeon were killed.
The fighting did not end there.
In 1400, the Second Strife of Princes broke out between Yi Bang-won and his older brother Yi Bang-gan. This time, Yi Bang-gan was defeated and exiled rather than executed. Yi Bang-won eventually became King Taejong, the third king of Joseon.
Interestingly, England experienced similarly dangerous royal conflicts during the Wars of the Roses in the 15th century.
In 1483, the young Edward V and his brother Richard disappeared after being taken to the Tower of London. Their fate remains one of Britain’s most famous historical mysteries, and historians still debate exactly what happened to them.
There is another surprising detail in Korean history: King Sejong, one of Korea’s most celebrated rulers and the creator of Hangul, the Korean alphabet, was not the eldest son.
Originally, Taejong’s eldest son, Prince Yangnyeong, was the crown prince. However, he was removed from that position in 1418. His younger brother, Prince Chungnyeong, the third son, was then appointed crown prince and eventually became King Sejong.
Unlike the earlier struggles, Sejong did not seize the throne through a military rebellion. Still, his succession demonstrates that being born first did not always guarantee the crown.
Joseon Crown Prince: When the King Himself Became a Threat
A crown prince’s greatest rival was not always his brother. Sometimes, the person who determined his fate was his own father.
One of the most tragic examples is Crown Prince Sado, the son of King Yeongjo and father of the future King Jeongjo.
King Yeongjo allowed Sado to participate in governing the kingdom on his behalf, a practice known as daericheongjeong, or regency on behalf of the reigning monarch. However, their relationship gradually deteriorated.
In 1762, King Yeongjo ordered his son to be confined inside a large wooden rice chest. Crown Prince Sado died there. The tragedy involved a complicated combination of family conflict, political factionalism, and tensions within the royal court.
Whenever I think about this event, I am reminded of how power can destroy even the closest family relationships.
Of course, not every Joseon king feared losing his authority to his son. But when the interests of the reigning king and his successor came into conflict, family ties alone could not always resolve the problem.
The children of queens and royal concubines could also become involved in succession disputes.
Joseon generally favored the eldest legitimate son born to the queen. However, if there was no eligible son from the queen, or if the line of succession changed, a son born to a royal concubine could also become king.
These disputes could become even more complicated when the princes’ maternal families and powerful political factions supported different candidates.
That is why historical K-Dramas often show queens and royal concubines struggling to protect their sons’ positions in the palace.
These storylines reflect real tensions in Joseon history, although not every political rivalry ended in poisoning, assassination, or a dramatic palace conspiracy.
The Princes Who Had to Survive Before They Could Wear the Crown
Joseon’s crown princes grew up surrounded by magnificent palaces, royal ceremonies, and privileges that ordinary people could only imagine. Yet their futures were never completely guaranteed.
Brothers could become rivals. Powerful officials could support or oppose them. Sometimes, even their own fathers could become the greatest obstacles to their succession.
When I watch historical K-Dramas, I often find myself paying more attention to the crown prince’s anxious expression than to his beautiful royal robes or the grand palace around him. It reminds me that being born into royalty could be both a privilege and a danger.
As the Wars of the Roses in England and the Strife of Princes in Joseon demonstrate, family conflicts over royal succession were not unique to one country.
So the next time you see a crown prince looking suspiciously at someone or fearing for his future in a K-Drama, remember that this tension is not simply a dramatic invention. It has roots in real history.
For a Joseon Crown Prince, perhaps the hardest part was not becoming king, but surviving long enough to reach the throne.