The Santa Fe Institute [SFI] is A non-profit research institute in Santa Fe, New Mexico founded by Murray Gell-Mann in 1984 to study complex systems and disseminate the notion of a separate interdisciplinary study of complexity theory.
SFI has recently announced that its original mission to develop and disseminate a general theory of complexity has been realized (noting that numerous complexity institutes and departments have sprung up around the world -- cf. CCS and the NECSI), and that it was working on updating its mission for the coming fifty years.
External links