An decent comp.lang.lisp thread discussing what makes Lisp unique.
A large part of the discussion is relevant to dynamic languages in general.
John linked to a message from Kent Pitman that is worth a look even if you don't have the inclination to wade through the entire thread.
I apologize for failing to give links to deep academic papers recently. It simply too hot around here to read or think about complicated stuff...
Posted to general by Ehud Lamm on 8/1/02; 6:30:38 PM