He has a Wikipedia <https://en.wikipedia.org/wiki/Christopher_Langton>article, a Wikiquote <https://en.wikiquote.org/wiki/Chris_Langton> page, and a/an NNDB<http://www.nndb.com/people/787/000080547/>page. The latter says he started the Swarm development group, which is now apparently the Center for the Study of Complex Systems (their web design looks rather similar to that of the Institute, and none of the three sections of their 'People' page <http://www.lsa.umich.edu/cscs/people>mention Langton, although they do mention John Holland). Other pages about Chris Langtons seem to refer to other people, including an athlete.
Murray Gellmann is alive and presumably well, and I am glad to have met him. Incidentally, if we are talking about famous people in complexity, the link and quote (a redux of a redux of a quote from Jonathan Swift about fractal fleas) that Stephen Guerin posted earlier is a good read; although Lewis Fry Richardson is not part of the circles we are talking about, having died in 1953, he appears to have been the one to originate the coastline length / fractal dimension thing, while researching whether countries with longer borders were more likely to be involved in wars with their neighbors. -Arlo James Barnes
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