Person

Yi I

1536–1584 · 16th century · Also known as Yulgok

Yi I, known as Yulgok, was one of the two greatest Neo-Confucian philosophers of Joseon Korea, alongside Yi Hwang. The son of the artist Sin Saimdang, he passed the civil service examinations at the top nine times and held high office. He stressed the unity of principle and material force and urged practical reforms of taxation and defence. He appears on the South Korean 5,000-won note.

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Cite this entry
APA
The Epoch Institute. (2026). Yi I. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/yi-i
MLA
“Yi I.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/yi-i. Accessed .
Chicago
The Epoch Institute. “Yi I.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/yi-i.
Harvard
The Epoch Institute (2026) ‘Yi I’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/yi-i (Accessed: ).

Last reviewed October 2026Random entry ↻