It's been a sad month for the computing world as we lose another great icon.
John McCarthy invented LISP and in doing was a pioneer of AI - contributing heavily to the field.
He will be greatly missed.
The register have written a better article on all his many contributions here: Father of Lisp and AI John McCarthy has died
If you're wondering how this relates to ruby - remember that ruby has been described as "an acceptable version of LISP"