Petros Gkionis is the founder of Extreme. He studied philosophy at KU Leuven and he is currently a member of a few High IQ societies such as:
Mensa Greece, Elite member (>=160 IQ sd 15) of the Grand IQ Society, Myriad High IQ Society, ISI-Society, Catholiq High IQ Society, Nebula High IQ Society, Prudentia High IQ Society, Atlantiq High IQ Society. He is also the President and Founder of Quasar Quorum, a High IQ society for >=150 IQ sd 15. (https://sites.google.com/view/quasarquorum)Â
He was interviewed by Scott Douglas Jacobsen, you can find the interview here.