Korean History › Early Joseon › Neo-Confucianism as state ideology
Factional politics (bungdang)
from 1575· Idea, religion or movement· Rulers & states
Well documentedSolid records, physical evidence or scientific consensus.
Joseon's long rivalry among scholar-official factions, beginning with the 1575 Easterner–Westerner split.
See it on the Korean History map →What happened
Bungdang (붕당) politics began in 1575, when officials split into Easterners (Dongin) and Westerners (Seoin) over who would fill a junior post that controlled appointments. Factions followed teacher lineages: Easterners loosely of Yi Hwang and Jo Sik, Westerners of Yi I and Seong Hon. Easterners split into Northerners and Southerners; Westerners later into Noron and Soron. Fights over policy, mourning rites and royal succession could end in exile or death. Kings Yeongjo and Jeongjo tried to balance them (tangpyeong, 'impartiality').
Why it matters
It gave Joseon real policy debate and checks on kings, but also cycles of purges. Colonial-era Japanese scholars used it to call Koreans inherently divisive, a view historians now reject.
How we know
The Sillok and each faction's own histories and memorials, which must be read with that side's bias in mind.
Still debated
Whether factions were mainly principled schools of thought or patronage networks competing for scarce posts remains debated.
Connections (3)
▸Literati purges (sahwa) fed into Factional politics (bungdang)Well documented
The connection
By the 1560s the sarim controlled the court, but the purges had taught them to see politics as a moral fight between the righteous and the wicked. When they split in 1575, over an appointment and how harshly to treat the old elite, that habit hardened disagreements into lasting factions.
When and how
1545–1575 in Hanyang (Seoul) under Kings Myeongjong and Seonjo; the 1575 split pitted Kim Hyo-won (Easterners) against Sim Ui-gyeom (Westerners).
How we know
Contemporary writings, including Yi I's memorials trying to reconcile the two sides, describe the split's origins.
Debates and open questions
Historians debate whether factions grew mainly from purge-era bitterness, from teacher lineages, or from too many graduates chasing too few posts.
▸Factional politics (bungdang) hampered preparations for Imjin War (Japanese invasions of Korea)Debated
The connection
In 1590 Joseon sent envoys to Japan. The Westerner chief envoy Hwang Yun-gil reported that Hideyoshi would invade; his Easterner deputy Kim Seong-il said he would not. The court, then led by Easterners, leaned toward Kim, partly to avoid panic, and preparations stayed limited.
When and how
1590–1591; the envoys returned to Hanyang (Seoul) in early 1591. King Seonjo, Hwang Yun-gil, Kim Seong-il and chief minister Yu Seong-ryong.
How sure are we?
The Sillok and Yu Seong-ryong's Jingbirok record the conflicting reports, and also real preparations, such as Yi Sun-sin's appointment.
Debates and open questions
How much factional bias, versus honest uncertainty, shaped the reports is debated, as is whether more preparation could have stopped Japan's veteran army.
▸King Yeongjo tried to curb Factional politics (bungdang)Well documented
The connection
Yeongjo came to power amid a deadly feud between the Noron and Soron factions, which had executed each other's leaders. His tangpyeong (impartiality) policy shared posts between factions, and in 1742 he set up a stele at the national Confucian academy warning against factionalism. Politics calmed, but the Noron stayed dominant.
When and how
Seoul, from 1725; the 1728 rebellion of radical Soron under Yi In-jwa spurred the policy.
How we know
The Annals; the Tangpyeong stele of 1742 still stands at Seonggyungwan in Seoul.
Debates and open questions
Historians debate whether tangpyeong ended factional strife or simply put it under royal management.