Where Intellects Meet

The USIA: United Sigma Intelligence Association, formerly United Sigma Korea, is the exclusively high intelligence organization, launching as the first and the oldest high intelligence society in South Korea, higher than the Mensa of 2 sigma and even higher than the Mega Society of 4.8 sigma.

With an international scope, USIA is 3 sigma, 4 sigma, and 5 sigma umbrella society, which was founded in 2007 by Dr. Hankyung Lee, M.D.


“All men by nature desire to know.” — Aristotle

“The object of knowledge is what exists and its function to know about reality.” — Plato