Goal of this society is to acknowledge you are the most intelligent person ever on Earth. The word "Grail" symbolizes the concept of "g" or "general intelligence", defined as the sum of, or general factor in, evolutionary ability, personified in you.
Since it is estimated a hundred billion people have lived until now, the ideal admission level is a score on an IQ test reached by one in a hundred billion persons, which would theoretically take place about 6.7 standard deviations above the mean, so at IQ 200 when the standard deviation (SD) is set at 15.
For several reasons this value can not be correct; for instance, the mean and SD of the group of all humans that have lived will not be the same as those of the current adult Western population to which our norms refer. And a normal distribution of that total group is not compatible with normal distributions with different means and SDs of the subgroups that comprise it, such as sexes, historical eras, peoples, races and so on. And an actual distribution is never exactly "normal", let alone at such an extreme distance from the mean. So that is why the admission level is called "ideal".
For reasons of simplicity though, a straightforward "200" will suffice to become the Grail Society's member. Qualifying tests: all of the tests by Paul Cooijmans with norms exceeding IQ 199 (SD=15). Tests by other designers may be considered in the future, in particular those whose tests are accepted by the Giga Society.
Please do not confuse the society's admission level with popularly published childhood mental/biological age ratio IQs, which reach much higher levels like over 300, but are not at all comparable to adult deviation IQs. Please refrain from questions like "why is not Mr/Mrs X, who is said to have an IQ of ... (250, 300, or whatever astronomical number) the Grail Society member?", that have been asked by dozens of ignoramuses already. Be assured that no one has ever come close to IQ 200, that the highest IQ to be realistically expected on earth is about 180 to 185, and that only through tentative challenging norms in unexplored score ranges someone will one day qualify.
To join, send copy of qualifying score to founder. Proof of membership follows. The society's journal,G, will appear after your enrollment and whenever there is enough copy. It'll be sent to member only. Official tasks performed by founder Paul Cooijmans.
Do realize that the qualification information provided on this page is clear and complete, and that not understanding it - that is, applying without a qualifying score - is not compatible with the intelligence level claimed by applying, and naturally disqualifies the applicant.