The Prometheus Society is a high-IQ society comparable to Mensa International. Their memebership requires higher test scores, however.
The Prometheus Society was established in 1982 by philosopher Ronald K. Hoeflin, Ph.D. (see picture) to promote fellowship among individuals with extremely high intelligence. Membership in the society is open to anyone who has received a score on an accepted IQ test that is equal to or greater than that received by the highest one thirty-thousandth of the general population. The Prometheus Society is a world-wide nonprofit organization with fewer than one hundred members. Currently there are participants from 18 countries.From their website
The society's journal is Gift of Fire.